Add 72/63 and 21/12
1st number: 1 9/63, 2nd number: 1 9/12
72/63 + 21/12 is 81/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 12 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 63 × 4 = 252,
72/63 = 72 × 4/63 × 4 = 288/252 - Likewise, for the 2nd fraction, since 12 × 21 = 252,
21/12 = 21 × 21/12 × 21 = 441/252 - Add the two like fractions:
288/252 + 441/252 = 288 + 441/252 = 729/252 - 729/252 simplified gives 81/28
- So, 72/63 + 21/12 = 81/28
In mixed form: 225/28
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