Add 28/54 and 15/20
28/54 + 15/20 is 137/108.
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,
28/54 = 28 × 10/54 × 10 = 280/540 - Likewise, for the 2nd fraction, since 20 × 27 = 540,
15/20 = 15 × 27/20 × 27 = 405/540 - Add the two like fractions:
280/540 + 405/540 = 280 + 405/540 = 685/540 - 685/540 simplified gives 137/108
- So, 28/54 + 15/20 = 137/108
In mixed form: 129/108
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