Add 18/28 and 21/18
1st number: 18/28, 2nd number: 1 3/18
18/28 + 21/18 is 38/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 18 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
18/28 = 18 × 9/28 × 9 = 162/252 - Likewise, for the 2nd fraction, since 18 × 14 = 252,
21/18 = 21 × 14/18 × 14 = 294/252 - Add the two like fractions:
162/252 + 294/252 = 162 + 294/252 = 456/252 - 456/252 simplified gives 38/21
- So, 18/28 + 21/18 = 38/21
In mixed form: 117/21
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