Subtract 45/18 from 42/5
1st number: 8 2/5, 2nd number: 2 9/18
42/5 - 45/18 is 59/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 18 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 18 × 5 = 90,
45/18 = 45 × 5/18 × 5 = 225/90 - Subtract the two like fractions:
756/90 - 225/90 = 756 - 225/90 = 531/90 - After reducing the fraction, the answer is 59/10
- In mixed form: 59/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/5-45/18 42/5-90/18 42/10-45/18 42/5-45/36 42/15-45/18 42/5-45/54 42/25-45/18 42/5-45/90 42/35-45/18