Subtract 63/40 from 9/8
1st number: 1 1/8, 2nd number: 1 23/40
9/8 - 63/40 is -9/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
9/8 = 9 × 5/8 × 5 = 45/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
63/40 = 63 × 1/40 × 1 = 63/40 - Subtract the two like fractions:
45/40 - 63/40 = 45 - 63/40 = -18/40 - After reducing the fraction, the answer is -9/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/8-63/40 9/16-63/40 9/8-63/80 27/8-63/40 9/24-63/40 45/8-63/40 9/40-63/40 63/8-63/40 9/56-63/40