Subtract 63/24 from 21/28
1st number: 21/28, 2nd number: 2 15/24
21/28 - 63/24 is -15/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 28 × 6 = 168,
21/28 = 21 × 6/28 × 6 = 126/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
63/24 = 63 × 7/24 × 7 = 441/168 - Subtract the two like fractions:
126/168 - 441/168 = 126 - 441/168 = -315/168 - After reducing the fraction, the answer is -15/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28-63/24 21/56-63/24 21/28-63/48 63/28-63/24 21/84-63/24 21/28-63/72