Subtract 21/20 from 72/15
1st number: 4 12/15, 2nd number: 1 1/20
72/15 - 21/20 is 15/4.
Steps for subtracting 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,
21/20 = 21 × 3/20 × 3 = 63/60 - Subtract the two like fractions:
288/60 - 63/60 = 288 - 63/60 = 225/60 - After reducing the fraction, the answer is 15/4
- In mixed form: 33/4
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