Subtract 24/40 from 4/7
4/7 - 24/40 is -1/35.
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,
4/7 = 4 × 40/7 × 40 = 160/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
24/40 = 24 × 7/40 × 7 = 168/280 - Subtract the two like fractions:
160/280 - 168/280 = 160 - 168/280 = -8/280 - After reducing the fraction, the answer is -1/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/7-24/40 4/7-48/40 4/14-24/40 4/7-24/80 12/7-24/40 4/7-72/40 4/21-24/40 20/7-24/40 4/35-24/40 28/7-24/40 4/49-24/40