Add 81/28 and 30/21
1st number: 2 25/28, 2nd number: 1 9/21
81/28 + 30/21 is 121/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
81/28 = 81 × 3/28 × 3 = 243/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
30/21 = 30 × 4/21 × 4 = 120/84 - Add the two like fractions:
243/84 + 120/84 = 243 + 120/84 = 363/84 - 363/84 simplified gives 121/28
- So, 81/28 + 30/21 = 121/28
In mixed form: 49/28
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