Add 72/81 and 56/70, Solve 72/81 + 56/70 as a fraction

Add 72/81 and 56/70

72/81 + 56/70 is 76/45.

Find the least common denominator or LCM of the two denominators:
LCM of 81 and 70 is 5670

Next, find the equivalent fraction of both fractional numbers with denominator 5670
For the 1st fraction, since 81 × 70 = 5670,
72/81 = 72 × 70/81 × 70 = 5040/5670
Likewise, for the 2nd fraction, since 70 × 81 = 5670,
56/70 = 56 × 81/70 × 81 = 4536/5670
Add the two like fractions:
5040/5670 + 4536/5670 = 5040 + 4536/5670 = 9576/5670
9576/5670 simplified gives 76/45
So, 72/81 + 56/70 = 76/45
In mixed form: 131/45

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