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Envision Math 2.0: Grade 6, Volume 2

EM

Envision Math 2.0: Grade 6, Volume 2 View details

4. Estimate to Find Percent

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Exercise 14 Page 359

Round one of the numbers and multiply.

About 58.5

Practice makes perfect

We want to estimate 65 % of 89. We will start by rounding the first number. 89is closer to90 than to80 ⇓ 89 ≈ 90 % Now we multiply the rounded number and the given number to get an estimation. First, we write the percent as a fraction.

65 %* 90

Write as a fraction

65/100 * 90

a/b=.a / 5./.b / 5.

65÷ 5/100÷ 5 * 90

Calculate quotient

13/20 * 90

MoveRightFacToNum

a/c* b = a* b/c

170/20

Calculate quotient

58.5

We found that 65 % of 89 is about 58.5.

Subchapter links

Do You Understand? p.358

Do You Know How? p.358

Practice & Problem Solving p.359-360

Assessment Practice p.360