Subtract 84/40 from 72/30
1st number: 2 12/30, 2nd number: 2 4/40
72/30 - 84/40 is 3/10.
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,
84/40 = 84 × 3/40 × 3 = 252/120 - Subtract the two like fractions:
288/120 - 252/120 = 288 - 252/120 = 36/120 - After reducing the fraction, the answer is 3/10
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