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Finding the Base

First write the word problem - (50 % of what is 10) into an equation -

50 % * w = 10

Second Change the 50% to a decimal and combine with w -

.50w = 10

Third divide by .50 so that you now have - w = 10 / .50

Fourth solve - w =10 / .50 so that you have the answer-

w =20

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