Add 21/15 and 90/27
1st number: 1 6/15, 2nd number: 3 9/27
21/15 + 90/27 is 71/15.
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,
90/27 = 90 × 5/27 × 5 = 450/135 - Add the two like fractions:
189/135 + 450/135 = 189 + 450/135 = 639/135 - 639/135 simplified gives 71/15
- So, 21/15 + 90/27 = 71/15
In mixed form: 411/15
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