Subtract 9/7 from 15/40
1st number: 15/40, 2nd number: 1 2/7
15/40 - 9/7 is -51/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 7 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 7 × 40 = 280,
9/7 = 9 × 40/7 × 40 = 360/280 - Subtract the two like fractions:
105/280 - 360/280 = 105 - 360/280 = -255/280 - After reducing the fraction, the answer is -51/56
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