Subtract 8/4 from 42/10
1st number: 4 2/10, 2nd number: 2 0/4
42/10 - 8/4 is 11/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 4 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 10 × 2 = 20,
42/10 = 42 × 2/10 × 2 = 84/20 - Likewise, for the 2nd fraction, since 4 × 5 = 20,
8/4 = 8 × 5/4 × 5 = 40/20 - Subtract the two like fractions:
84/20 - 40/20 = 84 - 40/20 = 44/20 - After reducing the fraction, the answer is 11/5
- In mixed form: 21/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/10-8/4 42/10-16/4 42/20-8/4 42/10-24/4 42/30-8/4 42/10-8/12 42/10-40/4 42/50-8/4 42/10-8/20 42/10-56/4 42/70-8/4 42/10-8/28