Subtract 18/40 from 9/7
1st number: 1 2/7, 2nd number: 18/40
9/7 - 18/40 is 117/140.
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,
9/7 = 9 × 40/7 × 40 = 360/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
18/40 = 18 × 7/40 × 7 = 126/280 - Subtract the two like fractions:
360/280 - 126/280 = 360 - 126/280 = 234/280 - After reducing the fraction, the answer is 117/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/7-18/40 9/7-36/40 9/14-18/40 9/7-18/80 27/7-18/40 9/7-54/40 9/21-18/40 45/7-18/40 9/7-90/40 9/35-18/40 63/7-18/40 9/49-18/40