Add 81/84 and 1/15
81/84 + 1/15 is 433/420.
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,
1/15 = 1 × 28/15 × 28 = 28/420 - Add the two like fractions:
405/420 + 28/420 = 405 + 28/420 = 433/420 - So, 81/84 + 1/15 = 433/420
In mixed form: 113/420
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