body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

Big Ideas Math: Modeling Real Life, Grade 7

BI

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

Chapter Review

Continue to next subchapter

Exercise 13 Page 273

Let x be 70 % of 70. Write and solve a percent proportion using x.

Proportion: x70= 70100
Solution: x=49

Practice makes perfect

Let x be 70 % of 70.

We can write a percent proportion using x. x/70=70/100 We will solve this equation using the Multiplication Property of Equality. Let's do it!

x/70=70/100

LHS * 70=RHS* 70

x/70 * 70 =70/100 * 70

FracMultDenomToNumber

a/70* 70 = a

x=70/100 * 70

MoveRightFacToNum

a/c* b = a* b/c

x=70* 70/100

Multiply

x=4900/100

Calculate quotient

x=49

We have that 49 is 70 % of 70.

Subchapter links

1 Fractions, Decimals and Percents p.273

2 The Percent Proportion p.273

3 The Percent Equation p.274

4 Percents of Increase and Decrease p.274

5 Discounts and Markups p.275

6 Simple Interest p.275