Subtract 18/40 from 15/7
1st number: 2 1/7, 2nd number: 18/40
15/7 - 18/40 is 237/140.
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,
15/7 = 15 × 40/7 × 40 = 600/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
18/40 = 18 × 7/40 × 7 = 126/280 - Subtract the two like fractions:
600/280 - 126/280 = 600 - 126/280 = 474/280 - After reducing the fraction, the answer is 237/140
- In mixed form: 197/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/7-18/40 15/7-36/40 15/14-18/40 15/7-18/80 45/7-18/40 15/7-54/40 15/21-18/40 75/7-18/40 15/7-90/40 15/35-18/40 15/49-18/40