Add 72/81 and 30/70
72/81 + 30/70 is 83/63.
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,
30/70 = 30 × 81/70 × 81 = 2430/5670 - Add the two like fractions:
5040/5670 + 2430/5670 = 5040 + 2430/5670 = 7470/5670 - 7470/5670 simplified gives 83/63
- So, 72/81 + 30/70 = 83/63
In mixed form: 120/63
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