Subtract 72/70 from 15/40
1st number: 15/40, 2nd number: 1 2/70
15/40 - 72/70 is -183/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
15/40 = 15 × 7/40 × 7 = 105/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
72/70 = 72 × 4/70 × 4 = 288/280 - Subtract the two like fractions:
105/280 - 288/280 = 105 - 288/280 = -183/280
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