Subtract 1/60 from 21/42
21/42 - 1/60 is 29/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
21/42 = 21 × 10/42 × 10 = 210/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
1/60 = 1 × 7/60 × 7 = 7/420 - Subtract the two like fractions:
210/420 - 7/420 = 210 - 7/420 = 203/420 - After reducing the fraction, the answer is 29/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 21/42-2/60 21/84-1/60 63/42-1/60 21/42-3/60 21/42-5/60 21/42-7/60