Add 28/15 and 81/70
1st number: 1 13/15, 2nd number: 1 11/70
28/15 + 81/70 is 127/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
28/15 = 28 × 14/15 × 14 = 392/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
81/70 = 81 × 3/70 × 3 = 243/210 - Add the two like fractions:
392/210 + 243/210 = 392 + 243/210 = 635/210 - 635/210 simplified gives 127/42
- So, 28/15 + 81/70 = 127/42
In mixed form: 31/42
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