Add 21/27 and 45/20
1st number: 21/27, 2nd number: 2 5/20
21/27 + 45/20 is 109/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 20 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 27 × 20 = 540,
21/27 = 21 × 20/27 × 20 = 420/540 - Likewise, for the 2nd fraction, since 20 × 27 = 540,
45/20 = 45 × 27/20 × 27 = 1215/540 - Add the two like fractions:
420/540 + 1215/540 = 420 + 1215/540 = 1635/540 - 1635/540 simplified gives 109/36
- So, 21/27 + 45/20 = 109/36
In mixed form: 31/36
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