Add 81/21 and 63/14
1st number: 3 18/21, 2nd number: 4 7/14
81/21 + 63/14 is 117/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
81/21 = 81 × 2/21 × 2 = 162/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
63/14 = 63 × 3/14 × 3 = 189/42 - Add the two like fractions:
162/42 + 189/42 = 162 + 189/42 = 351/42 - 351/42 simplified gives 117/14
- So, 81/21 + 63/14 = 117/14
In mixed form: 85/14
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