SOLUTION: The radius of a circle was increased by 25 percent. By what percent did the area of the circle increase?

Question 834817: The radius of a circle was increased by 25 percent. By what percent did the area of the circle increase?
Answer by reviewermath(1029) (Show Source): You can put this solution on YOUR website!
Q:
The radius of a circle was increased by 25 percent. By what percent did the area of the circle increase?
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Answer:
Area of Circle, A =
If old radius, = 1, then new radius, = 1.25 and
percent increase = , divide the numerator and denominator by
percent increase = = 0.5625 or 56.25%
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