Subtract 3/12 from 20/5
1st number: 4 0/5, 2nd number: 3/12
20/5 - 3/12 is 15/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 5 × 12 = 60,
20/5 = 20 × 12/5 × 12 = 240/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
3/12 = 3 × 5/12 × 5 = 15/60 - Subtract the two like fractions:
240/60 - 15/60 = 240 - 15/60 = 225/60 - After reducing the fraction, the answer is 15/4
- In mixed form: 33/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/5-3/12 20/5-6/12 20/10-3/12 20/5-3/24 60/5-3/12 20/5-9/12 20/15-3/12 20/5-3/36 20/5-15/12 20/25-3/12 20/5-3/60 20/5-21/12 20/35-3/12 20/5-3/84