Add 80/15 and 81/28
1st number: 5 5/15, 2nd number: 2 25/28
80/15 + 81/28 is 691/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 15 × 28 = 420,
80/15 = 80 × 28/15 × 28 = 2240/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
81/28 = 81 × 15/28 × 15 = 1215/420 - Add the two like fractions:
2240/420 + 1215/420 = 2240 + 1215/420 = 3455/420 - 3455/420 simplified gives 691/84
- So, 80/15 + 81/28 = 691/84
In mixed form: 819/84
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