Subtract 20/40 from 12/3
1st number: 4 0/3, 2nd number: 20/40
12/3 - 20/40 is 7/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 3 × 40 = 120,
12/3 = 12 × 40/3 × 40 = 480/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
20/40 = 20 × 3/40 × 3 = 60/120 - Subtract the two like fractions:
480/120 - 60/120 = 480 - 60/120 = 420/120 - After reducing the fraction, the answer is 7/2
- In mixed form: 31/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/3-20/40 12/6-20/40 12/3-20/80 36/3-20/40 12/3-60/40 12/9-20/40 60/3-20/40 12/15-20/40 84/3-20/40 12/21-20/40