Add 72/21 and 81/14
1st number: 3 9/21, 2nd number: 5 11/14
72/21 + 81/14 is 129/14.
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,
72/21 = 72 × 2/21 × 2 = 144/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
81/14 = 81 × 3/14 × 3 = 243/42 - Add the two like fractions:
144/42 + 243/42 = 144 + 243/42 = 387/42 - 387/42 simplified gives 129/14
- So, 72/21 + 81/14 = 129/14
In mixed form: 93/14
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