Subtract 63/28 from 42/24
1st number: 1 18/24, 2nd number: 2 7/28
42/24 - 63/28 is -1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 28 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
42/24 = 42 × 7/24 × 7 = 294/168 - Likewise, for the 2nd fraction, since 28 × 6 = 168,
63/28 = 63 × 6/28 × 6 = 378/168 - Subtract the two like fractions:
294/168 - 378/168 = 294 - 378/168 = -84/168 - After reducing the fraction, the answer is -1/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/24-63/28 42/48-63/28 42/24-63/56 42/72-63/28 42/24-63/84