# Using Proportions To Solve Percent Problems

In fact we always use the same label of when we set ours up. So they are easier to compare than fractions, as they always have the same denominator, 100. The amount saved is always the same portion or fraction of the price, but a higher price means more money is taken off.

In fact we always use the same label of when we set ours up. So they are easier to compare than fractions, as they always have the same denominator, 100. The amount saved is always the same portion or fraction of the price, but a higher price means more money is taken off.

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$$\frac,\: \: \frac$$ $$\frac\overset \frac$$ $$\frac\cdot 16\cdot 40\overset \frac\cdot 16\cdot 40$$ $$\frac\cdot\cdot 40\overset \frac\cdot 16\cdot$$ $$2\cdot 40\overset5\cdot 16$$ $$80=80$$ Here we can see that 2/16 and 5/40 are proportions since their cross products are equal.

Percent means hundredths or per hundred and is written with the symbol, %.

We then extend the fraction by 100 to get the decimal in percent. $$0.27\rightarrow \frac\cdot 100=\frac\: \: or\: \: 27\%$$ Percent è decimal: write the percent as a fraction with the denominator 100.

Remember that percent originally meant "cent", or if you prefer, "part(s) out of 100." If we keep this in mind, it's a lot easier to set up a proportion.

Interest rates on a saving account work in the same way.

The more money you put in your account, the more money you get in interest.

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.

Any of those parts may be the unknown value to be found.

Percent is a ratio were we compare numbers to 100 which means that 1% is 1/100.

Example In a box of eight donuts two have pink sprinkles.

## Comments Using Proportions To Solve Percent Problems

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