About this Flash Card Set
16 Cards
by ryan_mitchell
The everyday fraction-decimal-percent conversions worth memorizing, plus the core concepts behind them, for students who want number sense that sticks.
Front
1/2 as a decimal and percent
Back
0.5 = 50%
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Front
1/4 as a decimal and percent
Back
0.25 = 25%
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Front
3/4 as a decimal and percent
Back
0.75 = 75%
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Front
1/5 as a decimal and percent
Back
0.2 = 20%
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Front
1/3 as a decimal and percent
Back
≈ 0.333… = 33⅓% (the decimal repeats forever).
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Front
2/3 as a decimal and percent
Back
≈ 0.666… = 66⅔% (the decimal repeats forever).
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Front
1/10 as a decimal and percent
Back
0.1 = 10%
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Front
1/8 as a decimal and percent
Back
0.125 = 12.5%
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Front
1/100 as a decimal and percent
Back
0.01 = 1%
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Front
What is the numerator vs. the denominator?
Back
In a fraction, the numerator is the top number (how many parts you have) and the denominator is the bottom number (how many equal parts make a whole). Example: in 3/4, 3 is the numerator and 4 is the denominator.
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Front
How do you convert a fraction to a decimal?
Back
Divide the numerator by the denominator. Example: 3/4 = 3 ÷ 4 = 0.75.
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Front
How do you convert a decimal to a percent?
Back
Multiply by 100 and add a % sign (move the decimal point two places right). Example: 0.45 becomes 45%.
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Front
How do you convert a percent to a decimal?
Back
Divide by 100 (move the decimal point two places left) and drop the % sign. Example: 60% becomes 0.6.
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Front
How do you find X% of a number?
Back
Convert the percent to a decimal, then multiply. Example: 20% of 50 = 0.20 × 50 = 10.
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Front
What does 'percent' mean?
Back
Percent means 'per hundred.' A percent is a fraction out of 100. Example: 25% means 25 out of 100, which equals 25/100 = 1/4.
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Front
How do you convert a fraction to a percent?
Back
Convert the fraction to a decimal (divide top by bottom), then multiply by 100. Example: 1/4 = 0.25 = 25%.
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