Subtract 42/80 from 45/5
1st number: 9 0/5, 2nd number: 42/80
45/5 - 42/80 is 339/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 5 × 16 = 80,
45/5 = 45 × 16/5 × 16 = 720/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
42/80 = 42 × 1/80 × 1 = 42/80 - Subtract the two like fractions:
720/80 - 42/80 = 720 - 42/80 = 678/80 - After reducing the fraction, the answer is 339/40
- In mixed form: 819/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/5-42/80 45/5-84/80 45/10-42/80 45/15-42/80 45/25-42/80 45/35-42/80