Add 21/20 and 15/7
1st number: 1 1/20, 2nd number: 2 1/7
21/20 + 15/7 is 447/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
21/20 = 21 × 7/20 × 7 = 147/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
15/7 = 15 × 20/7 × 20 = 300/140 - Add the two like fractions:
147/140 + 300/140 = 147 + 300/140 = 447/140 - So, 21/20 + 15/7 = 447/140
In mixed form: 327/140
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