Expressed as a decimal, 4 1/5 is equal to 4.2.
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Do you mean what is four and one fifth in a decimal, or one fourth and one fifth in a decimal form? I'll give you either answer anyway: 4 1/5 = 4.2 1/4 = 0.75 and 1/5 = 0.2
One fifth as a decimal is 0.20 One fifth as a percentage is 20%
4.2 is the equivalent decimal fraction.
one fifth:= 1/5= 1 ÷ 5= 0.20 in decimal
Expressed as a decimal fraction, four and one fifth is equal to 4.2.