How To Solve Percentage Math Problems

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You probably put the amount (18) over 100 in the proportion, rather than the percent (125).

Perhaps you thought 18 was the percent and 125 was the base.

$$\frac=rate$$ Another way of saying this is that $$percent=\frac$$ Percent of change, or p%, indicates how much a quantity has increased or decreased in comparison with the original amount.

It's calculated as: $$percent\: of\: change=\frac$$ Example Johnny is at the store where there is a big sign telling him that there is a $4.99 discount on a shirt that originally costs $39.99. $$\frac\approx 0.12$$ $$0.12=12\%$$ The prize of the shirt has decreased by 12%.

Look at the pairs of multiplication and division facts below, and look for a pattern in each row.

Percent problems can also be solved by writing a proportion.

The correct percent fraction for the proportion is Jeff has a coupon at the Guitar Store for 15% off any purchase of 0 or more.

Jeff wonders how much money the coupon will take off of the 0 original price Percent problems have three parts: the percent, the base (or whole), and the amount.

Always make sure you know what is being asked, what operations are necessary and what units, if any, you need to include in your answer.

The simplest way to eliminate extraneous data is to identify the question; in this case, "How many games did Kim win in July?


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