Subtract 3/48 from 1/42
1/42 - 3/48 is -13/336.
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,
1/42 = 1 × 8/42 × 8 = 8/336 - Likewise, for the 2nd fraction, since 48 × 7 = 336,
3/48 = 3 × 7/48 × 7 = 21/336 - Subtract the two like fractions:
8/336 - 21/336 = 8 - 21/336 = -13/336
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/42-3/48 1/42-6/48 1/84-3/48 1/42-3/96 3/42-3/48 1/42-9/48 5/42-3/48 1/42-15/48 7/42-3/48 1/42-21/48