Subtract 3/63 from 21/20
1st number: 1 1/20, 2nd number: 3/63
21/20 - 3/63 is 421/420.
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,
3/63 = 3 × 20/63 × 20 = 60/1260 - Subtract the two like fractions:
1323/1260 - 60/1260 = 1323 - 60/1260 = 1263/1260 - After reducing the fraction, the answer is 421/420
- In mixed form: 11/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20-3/63 21/20-6/63 21/40-3/63 63/20-3/63 21/20-9/63 21/60-3/63 21/20-15/63 21/20-21/63