Applying Percentages in Real Life

Applying Percentages in Real Life

Lesson Goals

• Solve real-world problems involving percents.

Standards

• 6.NS.8 Interpret, model, and use ratios to show the relative sizes of two quantities. Describe how a ratio shows the relationship between two quantities. Use the following notations: a/b, a to b, a:b.

Multiple Choice

What is 6% as a decimal?

• 6

• 6.0

• .6

• .06

Multiple Choice

What is 61.5% as a decimal?

• 61.5

• 6.15

• .615

• 615.0

Multiple Choice

What is the percent formula?

• percent = part x whole

• part = percent x whole

• whole = part x percent

• whole = percent x whole

Madalyn has a 30 question test today. To get an A in the class she needs to get a 90% on the test. How many questions does she need to get right to get a 90%?

Multiple Select

Madalyn has a 30 question test today. To get an A in the class she needs to get a 90% on the test. How many questions does she need to get right to get a 90%?

What information do we know?

• part

• percent

• whole

Multiple Choice

Madalyn has a 30 question test today. To get an A in the class she needs to get a 90% on the test. How many questions does she need to get right to get a 90%?

If we know the percent and the whole, what should our percent formula look like?

• $30\ =\ .90x$

• $x\ =\ .90\cdot30$

• $90\ =\ .30\cdot x$

Of the 465 members in the US Congress, 26.5% are women. How many members of congress are women?

Multiple Select

Of the 465 members in the US Congress, 26.5% are women. How many members of congress are women?

What do we know?

• part

• percent

• whole

Multiple Choice

Of the 465 members in the US Congress, 26.5% are women. How many members of congress are women?

What should the formula look like?

• $465\ =\ 2.65x$

• $465\ =\ .265x$

• $x\ =\ .265\cdot465$

• $.265\ =\ x\ \cdot465$

Xbox Gold costs $10.00 per month. If you pay for a whole year at once, you save 40%. How much does Xbox Gold cost if you pay for a whole year at once?

• What do we need to do first?

• What do we know?

Poll

How do you feel about doing percentages so far?

• I got this!

• I could at least get a B

• I think I'm getting it, but I want more help.

• Is this Martian?