Add 54/15 and 12/20
1st number: 3 9/15, 2nd number: 12/20
54/15 + 12/20 is 21/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
54/15 = 54 × 4/15 × 4 = 216/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
12/20 = 12 × 3/20 × 3 = 36/60 - Add the two like fractions:
216/60 + 36/60 = 216 + 36/60 = 252/60 - 252/60 simplified gives 21/5
- So, 54/15 + 12/20 = 21/5
In mixed form: 41/5
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