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Big Ideas Math: Modeling Real Life, Grade 7

BI

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

1. Fractions, Decimals and Percents

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Exercise 25 Page 239

To write a fraction as a decimal, divide the numerator by the denominator. To write a decimal as a percent, multiply by 100 and add the percent symbol.

Decimal: 0.7
Percent: 77.7 %.

Practice makes perfect

Fractions, decimals, and percents are three ways to show parts of a whole. We want to write a fraction as a decimal and as a percent. Let's do these things one at a time.

Decimal

To write a fraction as a decimal, we divide the numerator by the denominator.

division

We found a pattern in the given quotient! 7÷ 9 = 0.777... We can write this repeating pattern as 0.7. 7÷ 9 = 0.7 We found that 79 expressed as a decimal is 0.7.

Percent

To write a fraction as a percent, we can use the equivalent decimal. To write a decimal as a percent, we multiply by 100 and add the percent symbol %.

We found that 0.7 expressed as a percent is 77.7 %.

Subchapter links

Try It p.236-237

Self-Assessment for Concept & Skills p.237

Self-Assessment for Problem Solving p.238

Review & Refresh p.239

Concept, Skills, & Problem Solving p.239-240