Subtract 8/10 from 4/42
4/42 - 8/10 is -74/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
4/42 = 4 × 5/42 × 5 = 20/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
8/10 = 8 × 21/10 × 21 = 168/210 - Subtract the two like fractions:
20/210 - 168/210 = 20 - 168/210 = -148/210 - After reducing the fraction, the answer is -74/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/42-8/10 4/42-16/10 4/84-8/10 4/42-8/20 12/42-8/10 4/42-24/10 4/42-8/30 20/42-8/10 4/42-40/10 4/42-8/50 28/42-8/10 4/42-56/10 4/42-8/70