Subtract 6/21 from 42/60
42/60 - 6/21 is 29/70.
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,
6/21 = 6 × 20/21 × 20 = 120/420 - Subtract the two like fractions:
294/420 - 120/420 = 294 - 120/420 = 174/420 - After reducing the fraction, the answer is 29/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/60-6/21 42/60-12/21 42/60-6/42 42/60-18/21 42/60-6/63 42/60-30/21 42/60-42/21