Subtract 45/40 from 6/7
1st number: 6/7, 2nd number: 1 5/40
6/7 - 45/40 is -15/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 7 × 40 = 280,
6/7 = 6 × 40/7 × 40 = 240/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
45/40 = 45 × 7/40 × 7 = 315/280 - Subtract the two like fractions:
240/280 - 315/280 = 240 - 315/280 = -75/280 - After reducing the fraction, the answer is -15/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/7-45/40 6/7-90/40 6/14-45/40 6/7-45/80 18/7-45/40 6/21-45/40 30/7-45/40 6/35-45/40 42/7-45/40 6/49-45/40