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A simple tool to remember is: IS over OF equals percent over 100.

If we put this into a proportion, we get:

IS/OF = percent/100.

Just put all percent problems into this format, and solve the proportion.

Example: 12.5 IS what percent OF 75?

Or,

12.5 IS | what percent | OF 75?

Just put these numbers into the proportion: (We will use x for the percent, as that is the unknown we are solving for)

12.5/75 = x/100.

Then solve by cross multiplying:

75x = 1250.

Then divide by 75:

x = 1250/75,

x = 16 2/3 %

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13y ago
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Q: How do you find the percent proportion?
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