Subtract 21/63 from 18/8
1st number: 2 2/8, 2nd number: 21/63
18/8 - 21/63 is 23/12.
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,
18/8 = 18 × 63/8 × 63 = 1134/504 - Likewise, for the 2nd fraction, since 63 × 8 = 504,
21/63 = 21 × 8/63 × 8 = 168/504 - Subtract the two like fractions:
1134/504 - 168/504 = 1134 - 168/504 = 966/504 - After reducing the fraction, the answer is 23/12
- In mixed form: 111/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/8-21/63 18/8-42/63 18/16-21/63 54/8-21/63 18/24-21/63 90/8-21/63 18/40-21/63 18/56-21/63