Add 15/2 and 21/20
1st number: 7 1/2, 2nd number: 1 1/20
15/2 + 21/20 is 171/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 2 × 10 = 20,
15/2 = 15 × 10/2 × 10 = 150/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
21/20 = 21 × 1/20 × 1 = 21/20 - Add the two like fractions:
150/20 + 21/20 = 150 + 21/20 = 171/20 - So, 15/2 + 21/20 = 171/20
In mixed form: 811/20
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