Add 21/10 and 42/7
1st number: 2 1/10, 2nd number: 6 0/7
21/10 + 42/7 is 81/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 7 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 10 × 7 = 70,
21/10 = 21 × 7/10 × 7 = 147/70 - Likewise, for the 2nd fraction, since 7 × 10 = 70,
42/7 = 42 × 10/7 × 10 = 420/70 - Add the two like fractions:
147/70 + 420/70 = 147 + 420/70 = 567/70 - 567/70 simplified gives 81/10
- So, 21/10 + 42/7 = 81/10
In mixed form: 81/10
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