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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 12 Page 359

Round one of the numbers and multiply.

About 16.5

Practice makes perfect

We want to estimate 34 % of 55. We will start by rounding the first number. 34is closer to30 than to40 ⇓ 34 % ≈ 30 % Now we multiply the rounded number and the given number to get an estimation. First, we write the percent as a fraction.

30 %* 55

Write as a fraction

30/100 * 55

a/b=.a / 10./.b / 10.

30÷ 10/100÷ 10 * 55

Calculate quotient

3/10 * 55

MoveRightFacToNum

a/c* b = a* b/c

165/10

Calculate quotient

16.5

We found that 34 % of 55 is about 16.5.

Subchapter links

Do You Understand? p.358

Do You Know How? p.358

Practice & Problem Solving p.359-360

Assessment Practice p.360