Add 18/20 and 81/40
1st number: 18/20, 2nd number: 2 1/40
18/20 + 81/40 is 117/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
18/20 = 18 × 2/20 × 2 = 36/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
81/40 = 81 × 1/40 × 1 = 81/40 - Add the two like fractions:
36/40 + 81/40 = 36 + 81/40 = 117/40 - So, 18/20 + 81/40 = 117/40
In mixed form: 237/40
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