Subtract 20/42 from 10/48
10/48 - 20/42 is -15/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 42 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 48 × 7 = 336,
10/48 = 10 × 7/48 × 7 = 70/336 - Likewise, for the 2nd fraction, since 42 × 8 = 336,
20/42 = 20 × 8/42 × 8 = 160/336 - Subtract the two like fractions:
70/336 - 160/336 = 70 - 160/336 = -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: 20/48-20/42 10/48-40/42 10/96-20/42 10/48-20/84 30/48-20/42 10/48-60/42 50/48-20/42 70/48-20/42