Subtract 45/30 from 72/40
1st number: 1 32/40, 2nd number: 1 15/30
72/40 - 45/30 is 3/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
72/40 = 72 × 3/40 × 3 = 216/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
45/30 = 45 × 4/30 × 4 = 180/120 - Subtract the two like fractions:
216/120 - 180/120 = 216 - 180/120 = 36/120 - After reducing the fraction, the answer is 3/10
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