ACT Preparation / Unit 7 ACT 0626 short lesson, about 20 seconds
The Percent Equation
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The idea
The percent equation is amount = percent × base. Any one of the three can be found from the other two, with the percent written as a decimal.
In practice
15% of 80 is 0.15 × 80 = 12. 18 is what percent of 72? 18 ÷ 72 = 0.25, or 25%.
Where people slip
The base is the number the percent is taken of.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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