Percent ProblemsAlgebra 1 September 14 & 17, 2012

Solving with Proportions

“a is p percent of b”

part

base (whole)

per – cent

Solving with Proportions

What percent of 50 is 33?

p = 66 66%

Solving with Proportions

35% of what number is 28?

b = 80

Solving with Proportions

What number is 40% of 90?

a = 36

Solving with Equations

“a is p percent of b”

part percent(written as a decimal)

base

Solving with Equations

What percent of 224 is 98?

p = 0.4375 43.75%

Solving with Equations

What number is 75% of 164?

a = 123

Solving with Equations

21 is 37.5% of what number?

b = 56

Word Problem

The circle graph shows the results of a survey in which 500 people in an office building were asked how they get to work.a. Estimate how many people use public

transportation to get to work.b. Estimate how many people do not use a

private automobile to get to work.

40 people

60 people