Add 72/81 and 63/70
72/81 + 63/70 is 161/90.
Steps for adding fractions
- 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,
63/70 = 63 × 81/70 × 81 = 5103/5670 - Add the two like fractions:
5040/5670 + 5103/5670 = 5040 + 5103/5670 = 10143/5670 - 10143/5670 simplified gives 161/90
- So, 72/81 + 63/70 = 161/90
In mixed form: 171/90
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