Subtract 20/12 from 30/48
1st number: 30/48, 2nd number: 1 8/12
30/48 - 20/12 is -25/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 12 is 48
Next, find the equivalent fraction of both fractional numbers with denominator 48 - For the 1st fraction, since 48 × 1 = 48,
30/48 = 30 × 1/48 × 1 = 30/48 - Likewise, for the 2nd fraction, since 12 × 4 = 48,
20/12 = 20 × 4/12 × 4 = 80/48 - Subtract the two like fractions:
30/48 - 80/48 = 30 - 80/48 = -50/48 - After reducing the fraction, the answer is -25/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/48-20/12 30/48-40/12 30/96-20/12 30/48-20/24 90/48-20/12 30/48-60/12 30/48-20/36 30/48-20/60 30/48-20/84