Subtract 8/63 from 21/20
1st number: 1 1/20, 2nd number: 8/63
21/20 - 8/63 is 1163/1260.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 63 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 20 × 63 = 1260,
21/20 = 21 × 63/20 × 63 = 1323/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
8/63 = 8 × 20/63 × 20 = 160/1260 - Subtract the two like fractions:
1323/1260 - 160/1260 = 1323 - 160/1260 = 1163/1260
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20-8/63 21/20-16/63 21/40-8/63 63/20-8/63 21/20-24/63 21/60-8/63 21/20-40/63 21/20-56/63