Add 28/84 and 21/15
1st number: 28/84, 2nd number: 1 6/15
28/84 + 21/15 is 26/15.
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,
28/84 = 28 × 5/84 × 5 = 140/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
21/15 = 21 × 28/15 × 28 = 588/420 - Add the two like fractions:
140/420 + 588/420 = 140 + 588/420 = 728/420 - 728/420 simplified gives 26/15
- So, 28/84 + 21/15 = 26/15
In mixed form: 111/15
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