Add 81/15 and 21/70
1st number: 5 6/15, 2nd number: 21/70
81/15 + 21/70 is 57/10.
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,
81/15 = 81 × 14/15 × 14 = 1134/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
21/70 = 21 × 3/70 × 3 = 63/210 - Add the two like fractions:
1134/210 + 63/210 = 1134 + 63/210 = 1197/210 - 1197/210 simplified gives 57/10
- So, 81/15 + 21/70 = 57/10
In mixed form: 57/10
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