Add 21/10 and 30/7
1st number: 2 1/10, 2nd number: 4 2/7
21/10 + 30/7 is 447/70.
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,
30/7 = 30 × 10/7 × 10 = 300/70 - Add the two like fractions:
147/70 + 300/70 = 147 + 300/70 = 447/70 - So, 21/10 + 30/7 = 447/70
In mixed form: 627/70
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