Subtract 8/42 from 3/24
3/24 - 8/42 is -11/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 42 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
3/24 = 3 × 7/24 × 7 = 21/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
8/42 = 8 × 4/42 × 4 = 32/168 - Subtract the two like fractions:
21/168 - 32/168 = 21 - 32/168 = -11/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/24-8/42 3/24-16/42 3/48-8/42 3/24-8/84 9/24-8/42 3/24-24/42 3/72-8/42 15/24-8/42 3/24-40/42 21/24-8/42 3/24-56/42