Add 15/60 and 2/21
15/60 + 2/21 is 29/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 21 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 21 × 20 = 420,
2/21 = 2 × 20/21 × 20 = 40/420 - Add the two like fractions:
105/420 + 40/420 = 105 + 40/420 = 145/420 - 145/420 simplified gives 29/84
- So, 15/60 + 2/21 = 29/84
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