Subtract 30/48 from 25/42
25/42 - 30/48 is -5/168.
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,
25/42 = 25 × 8/42 × 8 = 200/336 - Likewise, for the 2nd fraction, since 48 × 7 = 336,
30/48 = 30 × 7/48 × 7 = 210/336 - Subtract the two like fractions:
200/336 - 210/336 = 200 - 210/336 = -10/336 - After reducing the fraction, the answer is -5/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/42-30/48 25/42-60/48 25/84-30/48 25/42-30/96 75/42-30/48 25/42-90/48