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

Exercise 5 Page 177

Start by writing the given mixed number as a fraction. Then, divide the numerator by the denominator.

2.625

We want to write the given mixed number as a decimal. 2 58 We will first rewrite it as a fraction.

2 58
Rewrite 2 58 as 21/8
2* 8+5/8
16+5/8
21/8

We found that 2 58 is equal to 21 8 when it is written as a fraction. This means that we actually want to find the quotient 21÷ 8. We find the quotient by dividing the numerator of the fraction by its denominator. Let's do it!

We found that 218 written as a decimal is 2.625. Since we previously found that 2 58 is equal to 218, we can say that 2 58 written as a decimal is 2.625. 2 58= 218 ⇒ 21/8=2.625