Add 21/54 and 28/20
1st number: 21/54, 2nd number: 1 8/20
21/54 + 28/20 is 161/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 20 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 54 × 10 = 540,
21/54 = 21 × 10/54 × 10 = 210/540 - Likewise, for the 2nd fraction, since 20 × 27 = 540,
28/20 = 28 × 27/20 × 27 = 756/540 - Add the two like fractions:
210/540 + 756/540 = 210 + 756/540 = 966/540 - 966/540 simplified gives 161/90
- So, 21/54 + 28/20 = 161/90
In mixed form: 171/90
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