Subtract 8/16 from 10/42
10/42 - 8/16 is -11/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 16 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 42 × 8 = 336,
10/42 = 10 × 8/42 × 8 = 80/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
8/16 = 8 × 21/16 × 21 = 168/336 - Subtract the two like fractions:
80/336 - 168/336 = 80 - 168/336 = -88/336 - After reducing the fraction, the answer is -11/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/42-8/16 10/84-8/16 10/42-8/32 30/42-8/16 10/42-24/16 10/42-8/48 50/42-8/16 10/42-40/16 10/42-8/80 70/42-8/16 10/42-56/16