Which proportion can be used to solve the following percent problem? what is 50% of 70?

The answer is 

Explanation:

50% is equal to 50/100 and the variable (n) is the unknown "half" over 70. Though you aren't actually solving it, a way to test it would be multiplying 50 by 70 (cross multiplication) and n by 100. 50 x 70 = 3,500 divided by 100 (variable x 100) equals 35, which is half of 70.

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