Add 21/72 and 49/63
21/72 + 49/63 is 77/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 63 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
21/72 = 21 × 7/72 × 7 = 147/504 - Likewise, for the 2nd fraction, since 63 × 8 = 504,
49/63 = 49 × 8/63 × 8 = 392/504 - Add the two like fractions:
147/504 + 392/504 = 147 + 392/504 = 539/504 - 539/504 simplified gives 77/72
- So, 21/72 + 49/63 = 77/72
In mixed form: 15/72
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