Subtract 24/12 from 28/40
1st number: 28/40, 2nd number: 2 0/12
28/40 - 24/12 is -13/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 12 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
28/40 = 28 × 3/40 × 3 = 84/120 - Likewise, for the 2nd fraction, since 12 × 10 = 120,
24/12 = 24 × 10/12 × 10 = 240/120 - Subtract the two like fractions:
84/120 - 240/120 = 84 - 240/120 = -156/120 - After reducing the fraction, the answer is -13/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/40-24/12 28/40-48/12 28/80-24/12 84/40-24/12 28/40-72/12 28/40-24/36 28/40-24/60 28/40-24/84