Add 81/28 and 70/15
1st number: 2 25/28, 2nd number: 4 10/15
81/28 + 70/15 is 635/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
81/28 = 81 × 15/28 × 15 = 1215/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
70/15 = 70 × 28/15 × 28 = 1960/420 - Add the two like fractions:
1215/420 + 1960/420 = 1215 + 1960/420 = 3175/420 - 3175/420 simplified gives 635/84
- So, 81/28 + 70/15 = 635/84
In mixed form: 747/84
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