Add 21/30 and 15/4
1st number: 21/30, 2nd number: 3 3/4
21/30 + 15/4 is 89/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 4 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
21/30 = 21 × 2/30 × 2 = 42/60 - Likewise, for the 2nd fraction, since 4 × 15 = 60,
15/4 = 15 × 15/4 × 15 = 225/60 - Add the two like fractions:
42/60 + 225/60 = 42 + 225/60 = 267/60 - 267/60 simplified gives 89/20
- So, 21/30 + 15/4 = 89/20
In mixed form: 49/20
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