Subtract 18/20 from 12/3
1st number: 4 0/3, 2nd number: 18/20
12/3 - 18/20 is 31/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 3 × 20 = 60,
12/3 = 12 × 20/3 × 20 = 240/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
18/20 = 18 × 3/20 × 3 = 54/60 - Subtract the two like fractions:
240/60 - 54/60 = 240 - 54/60 = 186/60 - After reducing the fraction, the answer is 31/10
- In mixed form: 31/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/3-18/20 12/3-36/20 12/6-18/20 12/3-18/40 36/3-18/20 12/3-54/20 12/9-18/20 12/3-18/60 60/3-18/20 12/3-90/20 12/15-18/20 84/3-18/20 12/21-18/20