Subtract 4/21 from 42/60
42/60 - 4/21 is 107/210.
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,
42/60 = 42 × 7/60 × 7 = 294/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
4/21 = 4 × 20/21 × 20 = 80/420 - Subtract the two like fractions:
294/420 - 80/420 = 294 - 80/420 = 214/420 - After reducing the fraction, the answer is 107/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/60-4/21 42/60-8/21 42/60-4/42 42/60-12/21 42/60-4/63 42/60-20/21 42/60-28/21