Subtract 72/24 from 45/20
1st number: 2 5/20, 2nd number: 3 0/24
45/20 - 72/24 is -3/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 24 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 20 × 6 = 120,
45/20 = 45 × 6/20 × 6 = 270/120 - Likewise, for the 2nd fraction, since 24 × 5 = 120,
72/24 = 72 × 5/24 × 5 = 360/120 - Subtract the two like fractions:
270/120 - 360/120 = 270 - 360/120 = -90/120 - After reducing the fraction, the answer is -3/4
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