Add 54/21 and 18/63
1st number: 2 12/21, 2nd number: 18/63
54/21 + 18/63 is 20/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
54/21 = 54 × 3/21 × 3 = 162/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
18/63 = 18 × 1/63 × 1 = 18/63 - Add the two like fractions:
162/63 + 18/63 = 162 + 18/63 = 180/63 - 180/63 simplified gives 20/7
- So, 54/21 + 18/63 = 20/7
In mixed form: 26/7
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