0.66 as a fraction
0.66 is 66 hundredths, so write it as 66/100 and simplify to 33/50.
The answer
0.66 = 33/50
How to write 0.66 as a fraction
Put the digits in a place value chart. The place of the last digit tells you the bottom of the fraction.
| Ones | Tenths | Hundredths |
|---|---|---|
| 0 | 6 | 6 |
The last digit is in the hundredths column, so 0.66 is 66 hundredths: 66/100.
Simplify by dividing the top and bottom by the same number. In one go, divide by the highest common factor (the biggest whole number that divides both exactly), 2: 66/100 = 33/50.
33 and 50 share no factor except 1, so 33/50 is the simplest form.
As a percentage, 0.66 = 66%: multiply by 100, which moves each digit two places to the left.
See 33/50
Is 0.66 the same as 2/3?
No, though it is close. 2/3 = 0.6, where the 6 repeats for ever, which never stops, and as a percentage it is 66 2/3%. 0.66 stops, so it is a little less than 2/3.
2/3 rounds to 0.67 at 2 decimal places. If a question says 2/3, work with 2/3 itself, not 0.66: 2/3 of 300 is exactly 200, but 0.66 of 300 is 198.
More decimals as fractions
Questions parents ask
What is 0.66 as a fraction in its simplest form?
0.66 = 66/100 = 33/50. Divide the top and bottom of 66/100 by 2 to get 33/50.
How do you write 0.66 as a fraction?
The last digit of 0.66 is in the hundredths column, so write the digits over 100: 66/100. Then simplify if you can.
What is 0.66 as a percentage?
0.66 = 66%. Multiply by 100: the digits move two places to the left.
Is 0.66 the same as 2/3?
No. 2/3 = 0.666..., which goes on for ever. 0.66 stops, so it is a tiny bit less than 2/3. 2/3 rounds to 0.67 at 2 decimal places, not 0.66.
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