Add 15/12 and 72/42
1st number: 1 3/12, 2nd number: 1 30/42
15/12 + 72/42 is 83/28.
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,
15/12 = 15 × 7/12 × 7 = 105/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
72/42 = 72 × 2/42 × 2 = 144/84 - Add the two like fractions:
105/84 + 144/84 = 105 + 144/84 = 249/84 - 249/84 simplified gives 83/28
- So, 15/12 + 72/42 = 83/28
In mixed form: 227/28
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