Add 15/35 and 21/60
15/35 + 21/60 is 109/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 35 × 12 = 420,
15/35 = 15 × 12/35 × 12 = 180/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
21/60 = 21 × 7/60 × 7 = 147/420 - Add the two like fractions:
180/420 + 147/420 = 180 + 147/420 = 327/420 - 327/420 simplified gives 109/140
- So, 15/35 + 21/60 = 109/140
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