Subtract 40/54 from 15/63
15/63 - 40/54 is -95/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 63 × 6 = 378,
15/63 = 15 × 6/63 × 6 = 90/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
40/54 = 40 × 7/54 × 7 = 280/378 - Subtract the two like fractions:
90/378 - 280/378 = 90 - 280/378 = -190/378 - After reducing the fraction, the answer is -95/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/63-40/54 15/63-80/54 45/63-40/54 75/63-40/54