Chapter 2:Fractions, Decimals and Percentages, 2.5:Percentages

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Last updated 3:30 PM on 9/20/26
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19 Terms

1
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What is a percentage?
A fraction out of 100
2
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What symbol is used for percentage?
%
3
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How do you convert a percentage to a fraction?
Write the percentage over 100 and simplify if possible
4
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How do you convert a fraction to a percentage?
Convert it to a decimal and multiply by 100
5
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How do you convert a percentage to a decimal?
Divide by 100
6
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How do you convert a decimal to a percentage?
Multiply by 100
7
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How do you find a percentage of an amount?
Convert the percentage to a decimal or fraction and multiply by the amount
8
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How do you find what percentage one amount is of another?
Divide the part by the whole and multiply by 100
9
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What is the formula for percentage increase?
Increase ÷ original amount × 100
10
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What is the formula for percentage decrease?
Decrease ÷ original amount × 100
11
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What is a percentage multiplier?
A number used to multiply an original amount to find a changed amount
12
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What multiplier is used for a percentage increase?
1 + the percentage written as a decimal
13
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What multiplier is used for a percentage decrease?
1 − the percentage written as a decimal
14
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What multiplier is used to increase an amount by 10%?
1.10
15
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What multiplier is used to decrease an amount by 10%?
0.90
16
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What multiplier is used to increase an amount by 25%?
1.25
17
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What multiplier is used to decrease an amount by 25%?
0.75
18
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What value is used as the starting point when calculating percentage increase or decrease?
The original amount
19
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Can a percentage be greater than 100%?
Yes