Subtract 8/24 from 7/42
7/42 - 8/24 is -1/6.
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,
7/42 = 7 × 4/42 × 4 = 28/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
8/24 = 8 × 7/24 × 7 = 56/168 - Subtract the two like fractions:
28/168 - 56/168 = 28 - 56/168 = -28/168 - After reducing the fraction, the answer is -1/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/42-8/24 7/42-16/24 7/84-8/24 7/42-8/48 21/42-8/24 7/42-8/72 35/42-8/24 7/42-40/24 49/42-8/24 7/42-56/24