Subtract 8/12 from 8/40
8/40 - 8/12 is -7/15.
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,
8/40 = 8 × 3/40 × 3 = 24/120 - Likewise, for the 2nd fraction, since 12 × 10 = 120,
8/12 = 8 × 10/12 × 10 = 80/120 - Subtract the two like fractions:
24/120 - 80/120 = 24 - 80/120 = -56/120 - After reducing the fraction, the answer is -7/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/40-8/12 8/40-16/12 8/80-8/12 8/40-8/24 24/40-8/12 8/40-24/12 8/40-8/36 8/40-40/12 8/40-8/60 56/40-8/12 8/40-56/12 8/40-8/84