Add 20/21 and 27/18
1st number: 20/21, 2nd number: 1 9/18
20/21 + 27/18 is 103/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 21 × 6 = 126,
20/21 = 20 × 6/21 × 6 = 120/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
27/18 = 27 × 7/18 × 7 = 189/126 - Add the two like fractions:
120/126 + 189/126 = 120 + 189/126 = 309/126 - 309/126 simplified gives 103/42
- So, 20/21 + 27/18 = 103/42
In mixed form: 219/42
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