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Big Ideas Math: Modeling Real Life, Grade 7

BI

Big Ideas Math: Modeling Real Life, Grade 7 View details

4. Percents of Increase and Decrease

Finish the assignment

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Exercise 2 Page 257

Let p represent the percent that 39.2 is of 112. Write and solve a percent equation using p.

35 %

Practice makes perfect

Let p represent the percent that 39.2 is of 112.

We can write a percent equation using p. p* 112=39.2 We will solve this equation using the Division Property of Equality. Let's do it!

p* 112=39.2

Multiply

112p=39.2

.LHS /112.=.RHS /112.

112p/112=39.2/112

CancelCommonFac

Cancel out common factors

112p/112=39.2/112

Simplify quotient

p=39.2/112

Calculate quotient

p=0.35

Convert to percent

p=35 %

We have that 39.2 is 35 % of 112.

Subchapter links

Try It p.254-255

Self-Assessment for Concept & Skills p.255

Self-Assessment for Problem Solving p.256

Review & Refresh p.257

Concept, Skills, & Problem Solving p.257-258