Subtract 20/40 from 40/12
1st number: 3 4/12, 2nd number: 20/40
40/12 - 20/40 is 17/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 12 × 10 = 120,
40/12 = 40 × 10/12 × 10 = 400/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
20/40 = 20 × 3/40 × 3 = 60/120 - Subtract the two like fractions:
400/120 - 60/120 = 400 - 60/120 = 340/120 - After reducing the fraction, the answer is 17/6
- In mixed form: 25/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/12-20/40 40/24-20/40 40/12-20/80 40/12-60/40 40/36-20/40 40/60-20/40 40/84-20/40