Add 21/15 and 28/27
1st number: 1 6/15, 2nd number: 1 1/27
21/15 + 28/27 is 329/135.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 27 is 135
Next, find the equivalent fraction of both fractional numbers with denominator 135 - For the 1st fraction, since 15 × 9 = 135,
21/15 = 21 × 9/15 × 9 = 189/135 - Likewise, for the 2nd fraction, since 27 × 5 = 135,
28/27 = 28 × 5/27 × 5 = 140/135 - Add the two like fractions:
189/135 + 140/135 = 189 + 140/135 = 329/135 - So, 21/15 + 28/27 = 329/135
In mixed form: 259/135
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