Add 15/60 and 21/35
15/60 + 21/35 is 17/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 35 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
15/60 = 15 × 7/60 × 7 = 105/420 - Likewise, for the 2nd fraction, since 35 × 12 = 420,
21/35 = 21 × 12/35 × 12 = 252/420 - Add the two like fractions:
105/420 + 252/420 = 105 + 252/420 = 357/420 - 357/420 simplified gives 17/20
- So, 15/60 + 21/35 = 17/20
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