Subtract 9/8 from 40/50
1st number: 40/50, 2nd number: 1 1/8
40/50 - 9/8 is -13/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 8 is 200
Next, find the equivalent fraction of both fractional numbers with denominator 200 - For the 1st fraction, since 50 × 4 = 200,
40/50 = 40 × 4/50 × 4 = 160/200 - Likewise, for the 2nd fraction, since 8 × 25 = 200,
9/8 = 9 × 25/8 × 25 = 225/200 - Subtract the two like fractions:
160/200 - 225/200 = 160 - 225/200 = -65/200 - After reducing the fraction, the answer is -13/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/50-9/8 40/50-18/8 40/50-9/16 40/50-27/8 40/50-9/24 40/50-45/8 40/50-9/40 40/50-63/8 40/50-9/56