Add 72/15 and 75/20
1st number: 4 12/15, 2nd number: 3 15/20
72/15 + 75/20 is 171/20.
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,
72/15 = 72 × 4/15 × 4 = 288/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
75/20 = 75 × 3/20 × 3 = 225/60 - Add the two like fractions:
288/60 + 225/60 = 288 + 225/60 = 513/60 - 513/60 simplified gives 171/20
- So, 72/15 + 75/20 = 171/20
In mixed form: 811/20
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