Add 15/28 and 21/30
15/28 + 21/30 is 173/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
15/28 = 15 × 15/28 × 15 = 225/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
21/30 = 21 × 14/30 × 14 = 294/420 - Add the two like fractions:
225/420 + 294/420 = 225 + 294/420 = 519/420 - 519/420 simplified gives 173/140
- So, 15/28 + 21/30 = 173/140
In mixed form: 133/140
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