Add 18/15 and 9/28
1st number: 1 3/15, 2nd number: 9/28
18/15 + 9/28 is 213/140.
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,
18/15 = 18 × 28/15 × 28 = 504/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
9/28 = 9 × 15/28 × 15 = 135/420 - Add the two like fractions:
504/420 + 135/420 = 504 + 135/420 = 639/420 - 639/420 simplified gives 213/140
- So, 18/15 + 9/28 = 213/140
In mixed form: 173/140
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