Algebra 1, Percent

Algebra
Tutor: None Selected Time limit: 1 Day

What equation is used to calculate percents?

Dec 8th, 2014

Part/Whole = %/100.

Example: 25 % of 200 is____ 

In this problem, of = 200, is = ?, and % = 25

We get:

is/200 = 25/100

Since is in an unknown, you can replace it by y to make the problem more familiar

y/200 = 25/100

Cross multiply to get y × 100 = 200 × 25

y × 100 = 5000

Divide 5000 by 100 to get y

Since 5000/100 = 50, y = 50

So, 25 % of 200 is 50

Dec 8th, 2014

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