Subtract 6/8 from 42/10
1st number: 4 2/10, 2nd number: 6/8
42/10 - 6/8 is 69/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 10 × 4 = 40,
42/10 = 42 × 4/10 × 4 = 168/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
6/8 = 6 × 5/8 × 5 = 30/40 - Subtract the two like fractions:
168/40 - 30/40 = 168 - 30/40 = 138/40 - After reducing the fraction, the answer is 69/20
- In mixed form: 39/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/10-6/8 42/10-12/8 42/20-6/8 42/10-6/16 42/10-18/8 42/30-6/8 42/10-6/24 42/10-30/8 42/50-6/8 42/10-6/40 42/10-42/8 42/70-6/8 42/10-6/56