Subtract 45/40 from 72/30
1st number: 2 12/30, 2nd number: 1 5/40
72/30 - 45/40 is 51/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
72/30 = 72 × 4/30 × 4 = 288/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
45/40 = 45 × 3/40 × 3 = 135/120 - Subtract the two like fractions:
288/120 - 135/120 = 288 - 135/120 = 153/120 - After reducing the fraction, the answer is 51/40
- In mixed form: 111/40
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