Subtract 42/5 from 4/8
1st number: 4/8, 2nd number: 8 2/5
4/8 - 42/5 is -79/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 5 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 5 × 8 = 40,
42/5 = 42 × 8/5 × 8 = 336/40 - Subtract the two like fractions:
20/40 - 336/40 = 20 - 336/40 = -316/40 - After reducing the fraction, the answer is -79/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/8-84/5 4/16-42/5 4/8-42/10 12/8-42/5 4/24-42/5 4/8-42/15 20/8-42/5 4/40-42/5 4/8-42/25 28/8-42/5 4/56-42/5 4/8-42/35