Subtract 8/48 from 9/42
9/42 - 8/48 is 1/21.
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,
9/42 = 9 × 8/42 × 8 = 72/336 - Likewise, for the 2nd fraction, since 48 × 7 = 336,
8/48 = 8 × 7/48 × 7 = 56/336 - Subtract the two like fractions:
72/336 - 56/336 = 72 - 56/336 = 16/336 - After reducing the fraction, the answer is 1/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/42-8/48 9/42-16/48 9/84-8/48 9/42-8/96 27/42-8/48 9/42-24/48 45/42-8/48 9/42-40/48 63/42-8/48 9/42-56/48