Subtract 21/63 from 4/8
4/8 - 21/63 is 1/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 63 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 8 × 63 = 504,
4/8 = 4 × 63/8 × 63 = 252/504 - Likewise, for the 2nd fraction, since 63 × 8 = 504,
21/63 = 21 × 8/63 × 8 = 168/504 - Subtract the two like fractions:
252/504 - 168/504 = 252 - 168/504 = 84/504 - After reducing the fraction, the answer is 1/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/8-42/63 4/16-21/63 12/8-21/63 4/24-21/63 20/8-21/63 4/40-21/63 28/8-21/63 4/56-21/63