Subtract 42/5 from 70/4
1st number: 17 2/4, 2nd number: 8 2/5
70/4 - 42/5 is 91/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 5 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
70/4 = 70 × 5/4 × 5 = 350/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
42/5 = 42 × 4/5 × 4 = 168/20 - Subtract the two like fractions:
350/20 - 168/20 = 350 - 168/20 = 182/20 - After reducing the fraction, the answer is 91/10
- In mixed form: 91/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/4-84/5 70/8-42/5 70/4-42/10 70/12-42/5 70/4-42/15 70/20-42/5 70/4-42/25 70/28-42/5 70/4-42/35