Add 21/7 and 21/10
1st number: 3 0/7, 2nd number: 2 1/10
21/7 + 21/10 is 51/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 10 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 7 × 10 = 70,
21/7 = 21 × 10/7 × 10 = 210/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
21/10 = 21 × 7/10 × 7 = 147/70 - Add the two like fractions:
210/70 + 147/70 = 210 + 147/70 = 357/70 - 357/70 simplified gives 51/10
- So, 21/7 + 21/10 = 51/10
In mixed form: 51/10
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