Subtract 20/42 from 35/24
1st number: 1 11/24, 2nd number: 20/42
35/24 - 20/42 is 55/56.
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,
35/24 = 35 × 7/24 × 7 = 245/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
20/42 = 20 × 4/42 × 4 = 80/168 - Subtract the two like fractions:
245/168 - 80/168 = 245 - 80/168 = 165/168 - After reducing the fraction, the answer is 55/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/24-20/42 35/24-40/42 35/48-20/42 35/24-20/84 35/24-60/42 35/72-20/42