Count the places after the decimal point. 1 - 2 - 3 - 4
so the 0.0039 is worth 39 divided by 10 to the power 4, which is 1 with 4 zeros after it, i.e. 10000
So the answer is 39 "ten thousandths".
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Every fraction is an equivalent fraction: each fraction in decimal form has an equivalent rational fraction as well as an equivalent percentage fraction.
A fraction that has a different sign to the first fraction.
Divide the fraction by 100, and you will get the percentage of a fraction.
Or both. That's a complex fraction.
The number below the fraction bar in a fraction is the denominator. The number above the fraction bar is the numerator.