Add 9/15 and 18/28
9/15 + 18/28 is 87/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 15 × 28 = 420,
9/15 = 9 × 28/15 × 28 = 252/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
18/28 = 18 × 15/28 × 15 = 270/420 - Add the two like fractions:
252/420 + 270/420 = 252 + 270/420 = 522/420 - 522/420 simplified gives 87/70
- So, 9/15 + 18/28 = 87/70
In mixed form: 117/70
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