Subtract 15/42 from 42/48
42/48 - 15/42 is 29/56.
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,
42/48 = 42 × 7/48 × 7 = 294/336 - Likewise, for the 2nd fraction, since 42 × 8 = 336,
15/42 = 15 × 8/42 × 8 = 120/336 - Subtract the two like fractions:
294/336 - 120/336 = 294 - 120/336 = 174/336 - After reducing the fraction, the answer is 29/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/48-15/42 42/48-30/42 42/96-15/42 42/48-15/84 42/48-45/42 42/48-75/42