For example, you need to convert one-fourth into a decimal. What you need to do is that you have to divide the top number(1) by the bottom number(4). First, put a decimal point on the answer(because obviously it's going to be a decimal). Put a 0 on the one to make it 1.0(or 10). Don't pay attention to the decimal point because sometimes that can mess you up. 4 goes into 10 2 times because 4 x 2=8. You now have .2 as your answer. 10 - 8= 2 so put a 0 on the 2. 4 goes into 20 5 times because 4x5=20. Your answer is now 0.25.
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You use long division.
To express any fraction as a decimal, use long division to divide the numerator by the denominator.
To convert an improper fraction to a decimal, simply do long division or use a calculator to divide. eg. 15/8 = 1.875
To convert a fraction to percent you first convert the fraction to a decimal. To do that we use the method of in/out. The numerator goes inside the division sign and the deniminator goes outside. This will give you a decimal of .71428. Now you can convert the decimal to a percent by moving the decimall to the right 2 places. So, the equivalent percent to 5/7 is 71%.
Divide the numerator by the denominator.