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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 7 Page 358

Round one of the numbers and multiply.

About 600

Practice makes perfect

We want to estimate 73 % of 800. We will start by rounding the first number. 73is closer to75 than to70 ⇓ 73 % ≈ 75 % Now we multiply the rounded number and the given number to get an estimation. First, we write the percent as a fraction.

75 %* 800

Write as a fraction

75/100 * 800

a/b=.a / 25./.b / 25.

75÷ 25/100÷ 25 * 800

Calculate quotient

3/4 * 800

MoveRightFacToNum

a/c* b = a* b/c

2400/4

Calculate quotient

600

We found that 73 % of 800 is about 600.

Subchapter links

Do You Understand? p.358

Do You Know How? p.358

Practice & Problem Solving p.359-360

Assessment Practice p.360