Subtract 28/8 from 40/12
1st number: 3 4/12, 2nd number: 3 4/8
40/12 - 28/8 is -1/6.
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,
40/12 = 40 × 2/12 × 2 = 80/24 - Likewise, for the 2nd fraction, since 8 × 3 = 24,
28/8 = 28 × 3/8 × 3 = 84/24 - Subtract the two like fractions:
80/24 - 84/24 = 80 - 84/24 = -4/24 - After reducing the fraction, the answer is -1/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/12-28/8 40/12-56/8 40/24-28/8 40/12-28/16 40/12-84/8 40/36-28/8 40/12-28/24 40/60-28/8 40/12-28/40 40/84-28/8 40/12-28/56