Subtract 10/40 from 3/7
3/7 - 10/40 is 5/28.
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,
3/7 = 3 × 40/7 × 40 = 120/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
10/40 = 10 × 7/40 × 7 = 70/280 - Subtract the two like fractions:
120/280 - 70/280 = 120 - 70/280 = 50/280 - After reducing the fraction, the answer is 5/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/7-10/40 3/7-20/40 3/14-10/40 3/7-10/80 9/7-10/40 3/7-30/40 3/21-10/40 15/7-10/40 3/7-50/40 3/35-10/40 21/7-10/40 3/7-70/40 3/49-10/40