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

1. Fractions, Decimals and Percents

Continue to next subchapter

Exercise 30 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: 0.27
Percent: 27.27 %.

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! 3÷ 11 = 0.2727... We can write this repeating pattern as 0.27. 3÷ 11 = 0.27 We found that 311 expressed as a decimal is 0.27.

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 0.27 expressed as a percent is 27.27 %.

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