Subtract 20/63 from 21/24
21/24 - 20/63 is 281/504.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 63 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 24 × 21 = 504,
21/24 = 21 × 21/24 × 21 = 441/504 - Likewise, for the 2nd fraction, since 63 × 8 = 504,
20/63 = 20 × 8/63 × 8 = 160/504 - Subtract the two like fractions:
441/504 - 160/504 = 441 - 160/504 = 281/504
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/24-20/63 21/24-40/63 21/48-20/63 63/24-20/63 21/24-60/63 21/72-20/63