Add 42/81 and 20/70
42/81 + 20/70 is 152/189.
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,
42/81 = 42 × 70/81 × 70 = 2940/5670 - Likewise, for the 2nd fraction, since 70 × 81 = 5670,
20/70 = 20 × 81/70 × 81 = 1620/5670 - Add the two like fractions:
2940/5670 + 1620/5670 = 2940 + 1620/5670 = 4560/5670 - 4560/5670 simplified gives 152/189
- So, 42/81 + 20/70 = 152/189
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