Add 81/84 and 70/15
1st number: 81/84, 2nd number: 4 10/15
81/84 + 70/15 is 473/84.
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,
70/15 = 70 × 28/15 × 28 = 1960/420 - Add the two like fractions:
405/420 + 1960/420 = 405 + 1960/420 = 2365/420 - 2365/420 simplified gives 473/84
- So, 81/84 + 70/15 = 473/84
In mixed form: 553/84
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