Subtract 8/42 from 18/24
18/24 - 8/42 is 47/84.
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,
18/24 = 18 × 7/24 × 7 = 126/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
8/42 = 8 × 4/42 × 4 = 32/168 - Subtract the two like fractions:
126/168 - 32/168 = 126 - 32/168 = 94/168 - After reducing the fraction, the answer is 47/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/24-8/42 18/24-16/42 18/48-8/42 18/24-8/84 54/24-8/42 18/24-24/42 18/72-8/42 90/24-8/42 18/24-40/42 18/24-56/42