Subtract 42/80 from 20/2
1st number: 10 0/2, 2nd number: 42/80
20/2 - 42/80 is 379/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 2 × 40 = 80,
20/2 = 20 × 40/2 × 40 = 800/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
42/80 = 42 × 1/80 × 1 = 42/80 - Subtract the two like fractions:
800/80 - 42/80 = 800 - 42/80 = 758/80 - After reducing the fraction, the answer is 379/40
- In mixed form: 919/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/2-42/80 20/2-84/80 20/4-42/80 60/2-42/80 20/6-42/80 20/10-42/80 20/14-42/80