Add 21/72 and 63/56
1st number: 21/72, 2nd number: 1 7/56
21/72 + 63/56 is 17/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 56 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 56 × 9 = 504,
63/56 = 63 × 9/56 × 9 = 567/504 - Add the two like fractions:
147/504 + 567/504 = 147 + 567/504 = 714/504 - 714/504 simplified gives 17/12
- So, 21/72 + 63/56 = 17/12
In mixed form: 15/12
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