Subtract 45/20 from 72/15
1st number: 4 12/15, 2nd number: 2 5/20
72/15 - 45/20 is 51/20.
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,
45/20 = 45 × 3/20 × 3 = 135/60 - Subtract the two like fractions:
288/60 - 135/60 = 288 - 135/60 = 153/60 - After reducing the fraction, the answer is 51/20
- In mixed form: 211/20
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