Subtract 42/6 from 20/8
1st number: 2 4/8, 2nd number: 7 0/6
20/8 - 42/6 is -9/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 6 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 8 × 3 = 24,
20/8 = 20 × 3/8 × 3 = 60/24 - Likewise, for the 2nd fraction, since 6 × 4 = 24,
42/6 = 42 × 4/6 × 4 = 168/24 - Subtract the two like fractions:
60/24 - 168/24 = 60 - 168/24 = -108/24 - After reducing the fraction, the answer is -9/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/8-42/6 20/8-84/6 20/16-42/6 20/8-42/12 60/8-42/6 20/24-42/6 20/8-42/18 20/40-42/6 20/8-42/30 20/56-42/6