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Big Ideas Math: Modeling Real Life, Grade 7

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

Practice Test

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Exercise 11 Page 276

Let a represent the number that is 80 % of 45. Write and solve a percent equation using a.

36

We want to write and solve a proportion or equation to answer the question. Let's consider the given question!

What number is 80 % of 45?

In this case, a can represent the number that is 80 % of 45.

number lines

We can write a percent equation using a. a=p % * w ⇒ a=80 % * 45 We will solve this equation using the Division Property of Equality. Let's do it!

a=80 % * 45

a %=a/100

a=80/100* 45

MoveRightFacToNum

a/c* b = a* b/c

a=80* 45/100

Multiply

a=3600/100

Calculate quotient

a=36

We have that 36 is 80 % of 45.