Subtract 42/10 from 4/8
1st number: 4/8, 2nd number: 4 2/10
4/8 - 42/10 is -37/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 10 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
4/8 = 4 × 5/8 × 5 = 20/40 - Likewise, for the 2nd fraction, since 10 × 4 = 40,
42/10 = 42 × 4/10 × 4 = 168/40 - Subtract the two like fractions:
20/40 - 168/40 = 20 - 168/40 = -148/40 - After reducing the fraction, the answer is -37/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/8-84/10 4/16-42/10 4/8-42/20 12/8-42/10 4/24-42/10 4/8-42/30 20/8-42/10 4/40-42/10 4/8-42/50 28/8-42/10 4/56-42/10 4/8-42/70