Add 21/54 and 42/20
1st number: 21/54, 2nd number: 2 2/20
21/54 + 42/20 is 112/45.
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,
42/20 = 42 × 27/20 × 27 = 1134/540 - Add the two like fractions:
210/540 + 1134/540 = 210 + 1134/540 = 1344/540 - 1344/540 simplified gives 112/45
- So, 21/54 + 42/20 = 112/45
In mixed form: 222/45
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