Add 21/27 and 12/20
21/27 + 12/20 is 62/45.
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,
12/20 = 12 × 27/20 × 27 = 324/540 - Add the two like fractions:
420/540 + 324/540 = 420 + 324/540 = 744/540 - 744/540 simplified gives 62/45
- So, 21/27 + 12/20 = 62/45
In mixed form: 117/45
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