Add 21/18 and 54/20
1st number: 1 3/18, 2nd number: 2 14/20
21/18 + 54/20 is 58/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
21/18 = 21 × 10/18 × 10 = 210/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
54/20 = 54 × 9/20 × 9 = 486/180 - Add the two like fractions:
210/180 + 486/180 = 210 + 486/180 = 696/180 - 696/180 simplified gives 58/15
- So, 21/18 + 54/20 = 58/15
In mixed form: 313/15
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