Add 81/70 and 10/21
1st number: 1 11/70, 2nd number: 10/21
81/70 + 10/21 is 49/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
81/70 = 81 × 3/70 × 3 = 243/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
10/21 = 10 × 10/21 × 10 = 100/210 - Add the two like fractions:
243/210 + 100/210 = 243 + 100/210 = 343/210 - 343/210 simplified gives 49/30
- So, 81/70 + 10/21 = 49/30
In mixed form: 119/30
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