Add 70/81 and 20/36
70/81 + 20/36 is 115/81.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 36 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 81 × 4 = 324,
70/81 = 70 × 4/81 × 4 = 280/324 - Likewise, for the 2nd fraction, since 36 × 9 = 324,
20/36 = 20 × 9/36 × 9 = 180/324 - Add the two like fractions:
280/324 + 180/324 = 280 + 180/324 = 460/324 - 460/324 simplified gives 115/81
- So, 70/81 + 20/36 = 115/81
In mixed form: 134/81
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