Question

Sara collected $135 in donations for the hospital. This represents 5% of the total amount collected by her class. How much did the class collect in all?

A.$6.75
B.$130
C.$140
D.$2700

Answer 1

D

Explanation:

5/100 = 135/x

Cross multiply

5 × x = 100 × 135

5x = 13500

Divide both sides by 5 to isolate the variable

x = 2700

$2700

Check work by plugging the x value into the equation

5/100 = 135/2700

Convert 5/100 so that it has the same denominator as the other fraction

5 × 27/100 × 27

135/2700

135/2700 = 135/2700

Do they equal?

Yes, so our answer is correct

Answer 2

Explanation:

A(5/100)=135

A=100(135)/5

A=$2700