Subtract 40/54 from 2/7
2/7 - 40/54 is -86/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 7 × 54 = 378,
2/7 = 2 × 54/7 × 54 = 108/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
40/54 = 40 × 7/54 × 7 = 280/378 - Subtract the two like fractions:
108/378 - 280/378 = 108 - 280/378 = -172/378 - After reducing the fraction, the answer is -86/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/7-40/54 2/7-80/54 2/14-40/54 6/7-40/54 2/21-40/54 10/7-40/54 2/35-40/54 14/7-40/54 2/49-40/54