Add 7/15 and 21/36
7/15 + 21/36 is 21/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 15 × 12 = 180,
7/15 = 7 × 12/15 × 12 = 84/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
21/36 = 21 × 5/36 × 5 = 105/180 - Add the two like fractions:
84/180 + 105/180 = 84 + 105/180 = 189/180 - 189/180 simplified gives 21/20
- So, 7/15 + 21/36 = 21/20
In mixed form: 11/20
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