Add 90/28 and 21/15
1st number: 3 6/28, 2nd number: 1 6/15
90/28 + 21/15 is 323/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
90/28 = 90 × 15/28 × 15 = 1350/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
21/15 = 21 × 28/15 × 28 = 588/420 - Add the two like fractions:
1350/420 + 588/420 = 1350 + 588/420 = 1938/420 - 1938/420 simplified gives 323/70
- So, 90/28 + 21/15 = 323/70
In mixed form: 443/70
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