Question 5330
You can use the technique of solving proportions when working on percent problems.  Use is/of = rate/100.  % goes over 100.

7/28=x/100 = Cross Multiply

7 times 100 = 700
28 times  X = 28x

x = 25

To check you anser 28 X 25 = 700 and 7 X 100 = 700

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