Subtract 20/21 from 63/20
1st number: 3 3/20, 2nd number: 20/21
63/20 - 20/21 is 923/420.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
63/20 = 63 × 21/20 × 21 = 1323/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
20/21 = 20 × 20/21 × 20 = 400/420 - Subtract the two like fractions:
1323/420 - 400/420 = 1323 - 400/420 = 923/420 - In mixed form: 283/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/20-40/21 63/40-20/21 63/20-20/42 63/20-60/21 63/60-20/21 63/20-20/63