Subtract 18/7 from 10/40
1st number: 10/40, 2nd number: 2 4/7
10/40 - 18/7 is -65/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 7 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
10/40 = 10 × 7/40 × 7 = 70/280 - Likewise, for the 2nd fraction, since 7 × 40 = 280,
18/7 = 18 × 40/7 × 40 = 720/280 - Subtract the two like fractions:
70/280 - 720/280 = 70 - 720/280 = -650/280 - After reducing the fraction, the answer is -65/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40-18/7 10/40-36/7 10/80-18/7 10/40-18/14 30/40-18/7 10/40-54/7 10/40-18/21 50/40-18/7 10/40-90/7 10/40-18/35 70/40-18/7 10/40-18/49