Add 18/4 and 21/20
1st number: 4 2/4, 2nd number: 1 1/20
18/4 + 21/20 is 111/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
18/4 = 18 × 5/4 × 5 = 90/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
21/20 = 21 × 1/20 × 1 = 21/20 - Add the two like fractions:
90/20 + 21/20 = 90 + 21/20 = 111/20 - So, 18/4 + 21/20 = 111/20
In mixed form: 511/20
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