Add 15/18 and 20/56
15/18 + 20/56 is 25/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 56 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 18 × 28 = 504,
15/18 = 15 × 28/18 × 28 = 420/504 - Likewise, for the 2nd fraction, since 56 × 9 = 504,
20/56 = 20 × 9/56 × 9 = 180/504 - Add the two like fractions:
420/504 + 180/504 = 420 + 180/504 = 600/504 - 600/504 simplified gives 25/21
- So, 15/18 + 20/56 = 25/21
In mixed form: 14/21
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