Subtract 20/40 from 30/12
1st number: 2 6/12, 2nd number: 20/40
30/12 - 20/40 is 2/1.
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,
30/12 = 30 × 10/12 × 10 = 300/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
20/40 = 20 × 3/40 × 3 = 60/120 - Subtract the two like fractions:
300/120 - 60/120 = 300 - 60/120 = 240/120 - After reducing the fraction, the answer is 2/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/12-20/40 30/24-20/40 30/12-20/80 90/12-20/40 30/12-60/40 30/36-20/40 30/60-20/40 30/84-20/40