Subtract 18/42 from 15/24
15/24 - 18/42 is 11/56.
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,
15/24 = 15 × 7/24 × 7 = 105/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
18/42 = 18 × 4/42 × 4 = 72/168 - Subtract the two like fractions:
105/168 - 72/168 = 105 - 72/168 = 33/168 - After reducing the fraction, the answer is 11/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/24-18/42 15/24-36/42 15/48-18/42 15/24-18/84 45/24-18/42 15/24-54/42 15/72-18/42 75/24-18/42 15/24-90/42