Subtract 3/12 from 7/40
7/40 - 3/12 is -3/40.
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,
7/40 = 7 × 3/40 × 3 = 21/120 - Likewise, for the 2nd fraction, since 12 × 10 = 120,
3/12 = 3 × 10/12 × 10 = 30/120 - Subtract the two like fractions:
21/120 - 30/120 = 21 - 30/120 = -9/120 - After reducing the fraction, the answer is -3/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/40-3/12 7/40-6/12 7/80-3/12 7/40-3/24 21/40-3/12 7/40-9/12 7/40-3/36 35/40-3/12 7/40-15/12 7/40-3/60 49/40-3/12 7/40-21/12 7/40-3/84