Add 15/60 and 21/90
15/60 + 21/90 is 29/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 60 × 3 = 180,
15/60 = 15 × 3/60 × 3 = 45/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
21/90 = 21 × 2/90 × 2 = 42/180 - Add the two like fractions:
45/180 + 42/180 = 45 + 42/180 = 87/180 - 87/180 simplified gives 29/60
- So, 15/60 + 21/90 = 29/60
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