Add 21/36 and 35/72
21/36 + 35/72 is 77/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 36 × 2 = 72,
21/36 = 21 × 2/36 × 2 = 42/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
35/72 = 35 × 1/72 × 1 = 35/72 - Add the two like fractions:
42/72 + 35/72 = 42 + 35/72 = 77/72 - So, 21/36 + 35/72 = 77/72
In mixed form: 15/72
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