Subtract 40/8 from 9/12
1st number: 9/12, 2nd number: 5 0/8
9/12 - 40/8 is -17/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 8 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 12 × 2 = 24,
9/12 = 9 × 2/12 × 2 = 18/24 - Likewise, for the 2nd fraction, since 8 × 3 = 24,
40/8 = 40 × 3/8 × 3 = 120/24 - Subtract the two like fractions:
18/24 - 120/24 = 18 - 120/24 = -102/24 - After reducing the fraction, the answer is -17/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/12-40/8 9/12-80/8 9/24-40/8 9/12-40/16 27/12-40/8 9/36-40/8 9/12-40/24 45/12-40/8 9/60-40/8 63/12-40/8 9/84-40/8 9/12-40/56