Add 21/18 and 81/24
1st number: 1 3/18, 2nd number: 3 9/24
21/18 + 81/24 is 109/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 24 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
21/18 = 21 × 4/18 × 4 = 84/72 - Likewise, for the 2nd fraction, since 24 × 3 = 72,
81/24 = 81 × 3/24 × 3 = 243/72 - Add the two like fractions:
84/72 + 243/72 = 84 + 243/72 = 327/72 - 327/72 simplified gives 109/24
- So, 21/18 + 81/24 = 109/24
In mixed form: 413/24
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