Add 21/10 and 81/28
1st number: 2 1/10, 2nd number: 2 25/28
21/10 + 81/28 is 699/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 10 × 14 = 140,
21/10 = 21 × 14/10 × 14 = 294/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
81/28 = 81 × 5/28 × 5 = 405/140 - Add the two like fractions:
294/140 + 405/140 = 294 + 405/140 = 699/140 - So, 21/10 + 81/28 = 699/140
In mixed form: 4139/140
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