Subtract 1/21 from 3/60
3/60 - 1/21 is 1/420.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
3/60 = 3 × 7/60 × 7 = 21/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
1/21 = 1 × 20/21 × 20 = 20/420 - Subtract the two like fractions:
21/420 - 20/420 = 21 - 20/420 = 1/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/60-1/21 3/60-2/21 3/60-1/42 9/60-1/21 3/60-3/21 3/60-1/63 15/60-1/21 3/60-5/21 21/60-1/21 3/60-7/21