Add 42/36 and 18/21
1st number: 1 6/36, 2nd number: 18/21
42/36 + 18/21 is 85/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
42/36 = 42 × 7/36 × 7 = 294/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
18/21 = 18 × 12/21 × 12 = 216/252 - Add the two like fractions:
294/252 + 216/252 = 294 + 216/252 = 510/252 - 510/252 simplified gives 85/42
- So, 42/36 + 18/21 = 85/42
In mixed form: 21/42
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