Subtract 54/8 from 20/12
1st number: 1 8/12, 2nd number: 6 6/8
20/12 - 54/8 is -61/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 8 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 12 × 2 = 24,
20/12 = 20 × 2/12 × 2 = 40/24 - Likewise, for the 2nd fraction, since 8 × 3 = 24,
54/8 = 54 × 3/8 × 3 = 162/24 - Subtract the two like fractions:
40/24 - 162/24 = 40 - 162/24 = -122/24 - After reducing the fraction, the answer is -61/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/12-54/8 20/24-54/8 20/12-54/16 60/12-54/8 20/36-54/8 20/12-54/24 20/60-54/8 20/12-54/40 20/84-54/8 20/12-54/56