1/5 of 100 is 20
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100¢ = $1 1 nickel = 5¢ = $(5 ÷ 100) = $0.05 ⇒ 100 nickels = 100 x $0.05 = $5.00
1 ÷ 5 = 0 r 1 → first multiple of 5 in the range 1-100 is 1 x 5 = 5 100 ÷ 5 = 20 → last multiples of 5 in the range 1-100 is 20 x 5 = 100 → want the first 20 multiples of 5, namely: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100.
1 whole = 100 percent. 1 fifth = (1 whole)/5 = (100/5) = 20 percent.
It is: 1/5 of 100 = 20
140/100 14/10 7/5 1 2/5 or 140/100 1 40/10 1 4/10 1 2/5