Subtract 10/48 from 20/42
20/42 - 10/48 is 15/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 48 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 42 × 8 = 336,
20/42 = 20 × 8/42 × 8 = 160/336 - Likewise, for the 2nd fraction, since 48 × 7 = 336,
10/48 = 10 × 7/48 × 7 = 70/336 - Subtract the two like fractions:
160/336 - 70/336 = 160 - 70/336 = 90/336 - After reducing the fraction, the answer is 15/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42-10/48 20/42-20/48 20/84-10/48 20/42-10/96 60/42-10/48 20/42-30/48 20/42-50/48 20/42-70/48