5. To work this out divide 20 by 4.
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1 fifth is 20 percent less than 1 fourth.
There is no such thing as one-forth. But one fourth 5 is 1/20.
25% of 20= 25% * 20= 0.25 * 20= 5It is 1/4 of 20 = 5
1/20
1/4 minus 1/5 is 1/20.