Subtract 21/10 from 20/63
1st number: 20/63, 2nd number: 2 1/10
20/63 - 21/10 is -1123/630.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 10 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
20/63 = 20 × 10/63 × 10 = 200/630 - Likewise, for the 2nd fraction, since 10 × 63 = 630,
21/10 = 21 × 63/10 × 63 = 1323/630 - Subtract the two like fractions:
200/630 - 1323/630 = 200 - 1323/630 = -1123/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/63-21/10 20/63-42/10 20/63-21/20 60/63-21/10 20/63-63/10 20/63-21/30 20/63-21/50 20/63-21/70