Math for the Trades 2

Math for the Trades 2

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Percentages and equivalent numbers: 

Are you comfortable knowing that 50% is half of a number?

Are you comfortable converting a fraction into a percentage?

You’ll be making conversions like this to adjust machine loads or convert decimals to fraction to select the appropriate part or size of a tool.

Multiple Choice

What is the percent of 6 out of 12?

• 50%
• 5%
• 1.2%
• 0.05%

Multiple Choice

Change 3/4 to a percent?

• 7.5%

• 0.75%

• 7%

• 75%

Multiple Choice

Sales tax is __________ to the price

• subtracted

• added

• multiplied

• divided

Multiple Choice

Discount is ____________ from the price.

• added

• divided

• subtracted

• Mr. Ed is very old

Multiple Choice

Which percent is equal to the decimal 0.05?

• .05%

• 5%

• .5%

• 50%

Multiple Choice

Express the percent as a decimal
67%

• .67
• 6.7
• 67

Multiple Choice

What is 75% of 48?

• 27

• 41

• 32

• 36

Multiple Choice

What is 10% of 40?

• 2

• 6

• 4

• 8

Multiple Choice

What does the word percent mean?

• Out of 100

• Out of 10

• Out of 1,000

Multiple Choice

Calculate 25% of 80

• 20
• 80
• 48
• 95

Multiple Choice

What is 50% of 15?

• 30

• 7.5

• 7

• 8.5

Multiple Choice

9/10 written as a percent is...

• 9%

• 90%

• 900%

Multiple Choice

Out of a dozen eggs in a carton, nine had cracks! What percent had cracks?

• 75%

• 90%

• 66 ⅔%

• 60%

Multiple Choice

Convert the following fraction into a decimal.
24/48

• 24.48
• 2.4
• 0.5
• 2.0

Multiple Choice

What is 150% of $20? 

• $20
• $30
• $40
• $150

Multiple Choice

Convert 6% to a decimal

• .06
• .6
• 6.0
• 60

Multiple Choice

Write .506 as a percent.

• 5.06%
• 506%
• 50.6%
• 500.6%

Multiple Choice

Tom saves 50% of his paycheck. If his pay is $148, how much will he save? 

• $148
• $70
• $50
• $74

Multiple Select

Which answers are equivalent to 1/4?

• 25%

• 25/100

• 0.14

• 0.25

Multiple Choice

3/4 as a decimal:

• .75

• .80

• .50

• .25

Multiple Choice

What is the equivalent decimal?

• 2.25

• 2.14

• 9.4

Multiple Choice

Is it an increase or decrease?

12 inches to 36 inches

• Increase

• Decrease

Multiple Choice

Lacey bought a new purse that originally cost $25 and is on sale for $15. Find the percent of change in the price in the purse.

• Decrease of 40%
• Decrease of 10%
• Decrease of 30%
• Decrease of 20%

Multiple Choice

Find the percent of change.

From 20 miles to 11 miles.

• 45% decrease

• 45% increase

• 82% decrease

• 82% increase

Multiple Choice

Original: 80

New: 52

• 35% decrease

• 35% increase

• 28% decrease

• 28% increase

Multiple Choice

Calculate the percent increase. Round to the nearest percent.

Original: 12

New: 15

• 20%

• 0.25%

• 0.2%

• 25%

Multiple Choice

Calculate the percent increase. Round to the nearest percent.

Original: 36

New: 90

• 0.6%

• 150%

• 60%

• 1.5%

Multiple Choice

Calculate the percent increase. Round to the nearest percent.

Original: 9

New: 12

• 33%

• 25%

• 0.33%

• 0.25%

Multiple Choice

Calculate the percent increase. Round to the nearest percent.

Original: 74

New: 85

• 0.15%

• 0.13%

• 13%

• 15%

Multiple Choice

Calculate the percent increase. Round to the nearest percent.

Original: 45

New: 92

• 51%

• 1.04%

• 104%

• .51

Multiple Choice

Are the following equations equivalent?

6:10 and 18:30

• yes

• no

Multiple Choice

• 4
• 12

Multiple Choice

Jose swims 3 laps in a pool every 2 minutes. How long would it take him to swim 27 laps?

• 8 minutes
• 9 minutes
• 16 minutes
• 18 minutes

Multiple Choice

• 240
• 180
• 160
• 360

Multiple Choice

• 27
• 9
• 1
• 6

Multiple Choice

• 8
• 2
• 128
• 4

Multiple Choice

7. Find the unit rate of 624 calories in 3 servings.

• 1,872 calories per serving

• 208 calories per serving

• 624 calories per serving

• 621 calories per serving

Multiple Choice

You travel 150 miles on 5 gallons. How far did you travel per gallon?

• 15 miles
• 30 miles
• 3 miles
• 25 miles

Multiple Choice

What is it called when two different units are being compared?

• Rate

• Ratio

• Proportion

• Unit Rate

Multiple Choice

What is it called when two or more of the same units are being compared?

• Rate
• Ratio
• Proportion
• Unit Rate

Multiple Choice

Travis can ride his bike 3 miles in 20 minutes. At this rate, how long will it take to ride 9 miles? 

• 60 minutes
• 50 minutes
• 28 minutes
• 15 minutes

Multiple Choice

Which of the following options is a real life example of a ratio?

• 12 noodles
• 4 meatballs : 1 cup of sauce
• 1 jar of sauce
• 15 desserts

Multiple Choice

Which ratio is greater?

⅞ OR ½

• ⅞

• ½

• They are equal

Multiple Choice

Which ratio is greater?

4:1 or 6:2

• 4:1

• 6:2

• They are equal

Multiple Choice

If there are 5 boys and 7 girls, write the ratio of girls to boys.

• 5 to 7
• 7 to 5
• 5 to 12
• 7 to 12

Multiple Choice

• 3
• 5.3
• 1.08
• 27

Multiple Choice

When determining if two ratios are equivalent you can

• cross multiply the numbers to see if you get the same answer

• ask a neighbor

• skip the problem

• guess on the answer

Multiple Choice

  Which statement is true?

• 1/2  >  3/4
• 1/2 > 1/8
• 1/2 < 1/4
• 1/2 > 9/10

Multiple Choice

Choose the correct symbol to compare these fractions.

3/8 O 5/8

• >

• <

• =

• +

Multiple Choice

Which fraction is greater?

• $\frac{3}{4}$

• $\frac{2}{3}$

• Are equal

Multiple Choice

Which is greater?

3/4 or 2/4

• 3/4

• 2/4

Multiple Choice

A trail mix has  $\frac{1}{2}$  cup of raisins and  $\frac{2}{3}$  cup of peanuts. Which ingredient has the greater amount? 

• raisins

• peanuts

• they both have the same amount

Multiple Choice

A recipe calls for  $\frac{5}{8}$  cup of brown sugar and  $\frac{2}{3}$  cup of flour. Which ingredient has the greater amount?

• brown suagr

• flour

• they both have the same amount

Multiple Choice

Which symbol belongs in between the following comparison?

• >

• <

• =

Multiple Choice

Which symbol belongs in between the following comparison?

• >

• <

• =

Multiple Choice

Convert 1.5 to a percent.

• 15%

• 150%

• 1.5%

• 1500%

Multiple Choice

Convert 0.05 to a percent

• 50%

• 0.5%

• 500%

• 5%

Multiple Choice

Convert 25% to a decimal.

• 0.25

• 0.025

• 2.5

• 25

Multiple Choice

When determining if two ratios are equivalent you can

• cross multiply the numbers to see if you get the same answer

• ask a neighbor

• skip the problem

• guess on the answer

Poll

This material was helpful.

• Yes and I understood it.

• Yes and I would like more practice.

• No, I knew all of this material and got 100% on all of the questions without using a calculator.