Add 21/27 and 1/20
21/27 + 1/20 is 149/180.
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,
1/20 = 1 × 27/20 × 27 = 27/540 - Add the two like fractions:
420/540 + 27/540 = 420 + 27/540 = 447/540 - 447/540 simplified gives 149/180
- So, 21/27 + 1/20 = 149/180
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