Subtract 8/60 from 42/21
1st number: 2 0/21, 2nd number: 8/60
42/21 - 8/60 is 28/15.
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,
42/21 = 42 × 20/21 × 20 = 840/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
8/60 = 8 × 7/60 × 7 = 56/420 - Subtract the two like fractions:
840/420 - 56/420 = 840 - 56/420 = 784/420 - After reducing the fraction, the answer is 28/15
- In mixed form: 113/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21-8/60 42/21-16/60 42/21-24/60 42/63-8/60 42/21-40/60 42/21-56/60