Add 7/9 and 21/72
7/9 + 21/72 is 77/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 9 × 8 = 72,
7/9 = 7 × 8/9 × 8 = 56/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
21/72 = 21 × 1/72 × 1 = 21/72 - Add the two like fractions:
56/72 + 21/72 = 56 + 21/72 = 77/72 - So, 7/9 + 21/72 = 77/72
In mixed form: 15/72
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