Add 21/63 and 81/12
1st number: 21/63, 2nd number: 6 9/12
21/63 + 81/12 is 85/12.
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,
21/63 = 21 × 4/63 × 4 = 84/252 - Likewise, for the 2nd fraction, since 12 × 21 = 252,
81/12 = 81 × 21/12 × 21 = 1701/252 - Add the two like fractions:
84/252 + 1701/252 = 84 + 1701/252 = 1785/252 - 1785/252 simplified gives 85/12
- So, 21/63 + 81/12 = 85/12
In mixed form: 71/12
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