Subtract 63/60 from 1/21
1st number: 1/21, 2nd number: 1 3/60
1/21 - 63/60 is -421/420.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
1/21 = 1 × 20/21 × 20 = 20/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
63/60 = 63 × 7/60 × 7 = 441/420 - Subtract the two like fractions:
20/420 - 441/420 = 20 - 441/420 = -421/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21-63/60 1/42-63/60 3/21-63/60 1/63-63/60 5/21-63/60 7/21-63/60