Add 21/60 and 18/15
1st number: 21/60, 2nd number: 1 3/15
21/60 + 18/15 is 31/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 60 × 1 = 60,
21/60 = 21 × 1/60 × 1 = 21/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
18/15 = 18 × 4/15 × 4 = 72/60 - Add the two like fractions:
21/60 + 72/60 = 21 + 72/60 = 93/60 - 93/60 simplified gives 31/20
- So, 21/60 + 18/15 = 31/20
In mixed form: 111/20
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