Subtract 25/90 from 42/5
1st number: 8 2/5, 2nd number: 25/90
42/5 - 25/90 is 731/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
42/5 = 42 × 18/5 × 18 = 756/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
25/90 = 25 × 1/90 × 1 = 25/90 - Subtract the two like fractions:
756/90 - 25/90 = 756 - 25/90 = 731/90 - In mixed form: 811/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/5-25/90 42/5-50/90 42/10-25/90 42/5-75/90 42/15-25/90 42/25-25/90 42/35-25/90