Add 20/21 and 18/56
20/21 + 18/56 is 107/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
20/21 = 20 × 8/21 × 8 = 160/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
18/56 = 18 × 3/56 × 3 = 54/168 - Add the two like fractions:
160/168 + 54/168 = 160 + 54/168 = 214/168 - 214/168 simplified gives 107/84
- So, 20/21 + 18/56 = 107/84
In mixed form: 123/84
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