Subtract 15/7 from 40/45
1st number: 40/45, 2nd number: 2 1/7
40/45 - 15/7 is -79/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 7 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
40/45 = 40 × 7/45 × 7 = 280/315 - Likewise, for the 2nd fraction, since 7 × 45 = 315,
15/7 = 15 × 45/7 × 45 = 675/315 - Subtract the two like fractions:
280/315 - 675/315 = 280 - 675/315 = -395/315 - After reducing the fraction, the answer is -79/63
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