Add 45/12 and 81/42
1st number: 3 9/12, 2nd number: 1 39/42
45/12 + 81/42 is 159/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
45/12 = 45 × 7/12 × 7 = 315/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
81/42 = 81 × 2/42 × 2 = 162/84 - Add the two like fractions:
315/84 + 162/84 = 315 + 162/84 = 477/84 - 477/84 simplified gives 159/28
- So, 45/12 + 81/42 = 159/28
In mixed form: 519/28
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