Business Math Day 1

​Topic 1: Fractions, Decimals, and Percentages

By Ms. L

The bottom number is called the DENOMINATOR. It is the whole in the ratio of part to whole

Bottom Number

The top number is called the NUMERATOR. It is the part in the ratio of part to whole

Top Number

Fractions

Fractions can be equivalent to each other if they simplify to the same ratio

Multiple Choice

36/54

• 5/6

• 3/4

• 2/3

• 3/5

Multiple Choice

18/30

• 5/6

• 3/4

• 2/3

• 3/5

Multiple Choice

There are 28 birds in a tree. 7 of the birds flew away. What fraction of the birds flew away? Simplify if possible

• 7/28
• 1/4
• 3/4
• 28/7

Multiple Choice

Briana has 24 pencils. 10 of her pencils have a #3 on them, 8 of them have a #2 on them, and 6 of them have a #1 on them. What fraction of her pencils have a #2, simplify the fraction. 

• 10/24
• 8/24
• 1/3
• 1/4

Equivalent Fractions

When talking about fractions we often used their reduced form

If in a class of 32 there are 8 students who like to skateboard, while in another class of 24 students there are 6 students who like to skateboard, for both classes we would say "One-fourth of the students in the class like to skateboard"

Multiple Choice

Which is NOT an equivalent fraction to one half?

• 2/4
• 2/3
• 4/8
• 3/6

Multiple Choice

Which of the following is an equivalent fraction to 5/6?

• 9/12
• 10/12
• 8/12
• 14/18

Multiple Choice

Are the fractions equivalent?

$$\frac{4}{5}\ \ and\ \frac{20}{25}$$  

• Yes, they are equivalent.

• No, they are not equivalent.

Multiple Choice

Which picture shows 2/8?

• green
• blue
• purple
• pink

Fractions to Decimals

Sometimes fractions are annoying and not helpful so we need to know how to convert to decimals

To go from fractions to decimals, we turn our fraction into a division calculation

Multiple Choice

What is  $$\frac{2}{9}$$   as a decimal?

• 0.29292

• 0.2

• 0.222...

• 0.29

Multiple Choice

What decimal is equivalent to 9/10?

• 0.9
• 9.0
• 9.10
• 10.9

Multiple Choice

What decimal is equivalent to 3/5?

• 0.35
• 0.4
• 0.3
• 0.6

Multiple Choice

Write 3/8 as a decimal.

• 0.375

• 0.38

• 3.8

• 0.3

Decimals to Percentages

Decimals are good for figuring out some things but when we talk about things in life we are more likely to use percentages

To go from decimals to percentages, we multiply our decimal by 100 and add the percent symbol

Multiple Choice

Change .384 to a percent

• 384%
• 38.4%
• .00348%
• 3.84%

Multiple Choice

0.125 as a percent

• 12.5%
• 1.25%
• 1/8
• 125%

Multiple Choice

Convert to a percentage

• 13%

• 26%

• 52%

• 39%

Multiple Choice

Express each decimal as a percent 0.31.

• 3.1%

• 31%

• 310%

• 3100%