To add one fifteenth (1/15) and one fifth (1/5), first convert one fifth to have a common denominator of 15. One fifth is equivalent to three fifteenths (3/15). Therefore, 1/15 + 3/15 equals 4/15.
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It is: 3/5+1/3+7/15 = 7/5 or as 1 and 2/5 which is 1.4 as a decimal
1/5 ÷ 1/15 = 3
one third is larger than one fifth
79/120 or .6583333333333
They add up to 4/5