CAT Math Practice: Percents: Find x?
Question
a is x % of b, b is x% more than a. Find x?
Explanatory Answer
a = bx
b = a (1 + x), substituting this in the previous equation, we get
x (x + 1) = 1
x
2
+ x - 1 = 0
or x is approximately 0.62 or 62%
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