Add 7/12 and 21/72
7/12 + 21/72 is 7/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 12 × 6 = 72,
7/12 = 7 × 6/12 × 6 = 42/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
21/72 = 21 × 1/72 × 1 = 21/72 - Add the two like fractions:
42/72 + 21/72 = 42 + 21/72 = 63/72 - 63/72 simplified gives 7/8
- So, 7/12 + 21/72 = 7/8
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