Add 21/9 and 81/28
1st number: 2 3/9, 2nd number: 2 25/28
21/9 + 81/28 is 439/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 28 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 9 × 28 = 252,
21/9 = 21 × 28/9 × 28 = 588/252 - Likewise, for the 2nd fraction, since 28 × 9 = 252,
81/28 = 81 × 9/28 × 9 = 729/252 - Add the two like fractions:
588/252 + 729/252 = 588 + 729/252 = 1317/252 - 1317/252 simplified gives 439/84
- So, 21/9 + 81/28 = 439/84
In mixed form: 519/84
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