Add 54/56 and 1/21
54/56 + 1/21 is 85/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 56 × 3 = 168,
54/56 = 54 × 3/56 × 3 = 162/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
1/21 = 1 × 8/21 × 8 = 8/168 - Add the two like fractions:
162/168 + 8/168 = 162 + 8/168 = 170/168 - 170/168 simplified gives 85/84
- So, 54/56 + 1/21 = 85/84
In mixed form: 11/84
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