64.5 percent as fraction is 129/200.
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20 percent of 645 is 129.
0.645 as a fraction = 645/1000
645
To simplify the fraction 0.645, we first need to convert it to a fraction form. 0.645 can be written as 645/1000. To simplify this fraction, we need to find the greatest common divisor (GCD) of 645 and 1000, which is 5. Dividing both the numerator and denominator by 5 gives us the simplest form of the fraction, which is 129/200.
Converting a fraction to a percent.