Add 21/70 and 81/10
1st number: 21/70, 2nd number: 8 1/10
21/70 + 81/10 is 42/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 10 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 70 × 1 = 70,
21/70 = 21 × 1/70 × 1 = 21/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
81/10 = 81 × 7/10 × 7 = 567/70 - Add the two like fractions:
21/70 + 567/70 = 21 + 567/70 = 588/70 - 588/70 simplified gives 42/5
- So, 21/70 + 81/10 = 42/5
In mixed form: 82/5
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