Add 18/10 and 21/20
1st number: 1 8/10, 2nd number: 1 1/20
18/10 + 21/20 is 57/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 10 × 2 = 20,
18/10 = 18 × 2/10 × 2 = 36/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
21/20 = 21 × 1/20 × 1 = 21/20 - Add the two like fractions:
36/20 + 21/20 = 36 + 21/20 = 57/20 - So, 18/10 + 21/20 = 57/20
In mixed form: 217/20
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