Add 81/84 and 5/15
81/84 + 5/15 is 109/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
81/84 = 81 × 5/84 × 5 = 405/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
5/15 = 5 × 28/15 × 28 = 140/420 - Add the two like fractions:
405/420 + 140/420 = 405 + 140/420 = 545/420 - 545/420 simplified gives 109/84
- So, 81/84 + 5/15 = 109/84
In mixed form: 125/84
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