Add 81/27 and 21/28
1st number: 3 0/27, 2nd number: 21/28
81/27 + 21/28 is 15/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 28 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 27 × 28 = 756,
81/27 = 81 × 28/27 × 28 = 2268/756 - Likewise, for the 2nd fraction, since 28 × 27 = 756,
21/28 = 21 × 27/28 × 27 = 567/756 - Add the two like fractions:
2268/756 + 567/756 = 2268 + 567/756 = 2835/756 - 2835/756 simplified gives 15/4
- So, 81/27 + 21/28 = 15/4
In mixed form: 33/4
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