Add 21/18 and 90/28
1st number: 1 3/18, 2nd number: 3 6/28
21/18 + 90/28 is 92/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 28 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 18 × 14 = 252,
21/18 = 21 × 14/18 × 14 = 294/252 - Likewise, for the 2nd fraction, since 28 × 9 = 252,
90/28 = 90 × 9/28 × 9 = 810/252 - Add the two like fractions:
294/252 + 810/252 = 294 + 810/252 = 1104/252 - 1104/252 simplified gives 92/21
- So, 21/18 + 90/28 = 92/21
In mixed form: 48/21
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