Subtract 7/20 from 40/12
1st number: 3 4/12, 2nd number: 7/20
40/12 - 7/20 is 179/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
40/12 = 40 × 5/12 × 5 = 200/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
7/20 = 7 × 3/20 × 3 = 21/60 - Subtract the two like fractions:
200/60 - 21/60 = 200 - 21/60 = 179/60 - In mixed form: 259/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/12-7/20 40/12-14/20 40/24-7/20 40/12-7/40 40/12-21/20 40/36-7/20 40/12-7/60 40/12-35/20 40/60-7/20 40/12-49/20 40/84-7/20