Add 81/42 and 70/12
1st number: 1 39/42, 2nd number: 5 10/12
81/42 + 70/12 is 163/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
81/42 = 81 × 2/42 × 2 = 162/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
70/12 = 70 × 7/12 × 7 = 490/84 - Add the two like fractions:
162/84 + 490/84 = 162 + 490/84 = 652/84 - 652/84 simplified gives 163/21
- So, 81/42 + 70/12 = 163/21
In mixed form: 716/21
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