Subtract 4/24 from 3/42
3/42 - 4/24 is -2/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
3/42 = 3 × 4/42 × 4 = 12/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
4/24 = 4 × 7/24 × 7 = 28/168 - Subtract the two like fractions:
12/168 - 28/168 = 12 - 28/168 = -16/168 - After reducing the fraction, the answer is -2/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/42-4/24 3/42-8/24 3/84-4/24 3/42-4/48 9/42-4/24 3/42-12/24 3/42-4/72 15/42-4/24 3/42-20/24 21/42-4/24 3/42-28/24