Add 21/54 and 12/20
21/54 + 12/20 is 89/90.
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,
12/20 = 12 × 27/20 × 27 = 324/540 - Add the two like fractions:
210/540 + 324/540 = 210 + 324/540 = 534/540 - 534/540 simplified gives 89/90
- So, 21/54 + 12/20 = 89/90
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