# math

how do u figure out what 18% of 34 is?

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1. Change 18% to a decimal: 0.18

Multiply:

0.18 * 34 = ?

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Ms. Sue
2. thanks so u move the decimal two to the left on the first #

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3. Right.

18% means 18 parts of 100. Another way of writing that is 18 hundredths or 0.18.

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Ms. Sue
4. so if u had 4% of 56 it would be o.o4 *56=the answer

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5. Right.

0.04 * 56 = ?

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Ms. Sue
thirty percent of what number is 120?

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7. how do u figure that out

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8. 30% = 0.3

Multiply.

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Ms. Sue
9. You can set up an equation:

30%= .3, so you'll have

.3x= 120 (where x is the number whose 30% is 120)

x= 120/.3
x= 400

You can check by multiply .3 x 400= 120

So 30% of 400 is 120

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