Q: How do you use a proportion to find a percent of a number?

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To find a percent.

A percent is simply a proportion out of 100.

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 %

There is no "should" or "should not". The depends on the question that you are trying to answer.

Use a proportion.- x/63.2=16/100 100x=16x63.2 100x/100=1011.2/100 x=10.112

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http://www.mathgoodies.com/lessons/percent/proportions.html this website helped me ! =]

To find a percent.

100

A percent is simply a proportion out of 100.

32

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 %

There is no "should" or "should not". The depends on the question that you are trying to answer.

Use a proportion.- x/63.2=16/100 100x=16x63.2 100x/100=1011.2/100 x=10.112

7/29=M/100

use the rule: is / of = percent / 100reword the question in your head What is 16 percent of 90?(percent = 16) (of = 90) is is the unknown pick a variable -- xx / 90 = 16 / 100 now solve for xx = 14.4

Any time that you wanted to.