2 1/5 = 2.2 Take 1/5. Multiply numerator & denominator by 2. 5*2=10 & 1*2=2 so you have 2/10 or .2
for other numbers take the two numbers and divide them:
Example: 4/29 = .137931...
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.2
One fifth in decimal ways would be .2 or .20
.2
One fifth as a decimal is 0.20 One fifth as a percentage is 20%
one fifth:= 1/5= 1 ÷ 5= 0.20 in decimal