Subtract 80/18 from 42/50
1st number: 42/50, 2nd number: 4 8/18
42/50 - 80/18 is -811/225.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 18 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 50 × 9 = 450,
42/50 = 42 × 9/50 × 9 = 378/450 - Likewise, for the 2nd fraction, since 18 × 25 = 450,
80/18 = 80 × 25/18 × 25 = 2000/450 - Subtract the two like fractions:
378/450 - 2000/450 = 378 - 2000/450 = -1622/450 - After reducing the fraction, the answer is -811/225
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/50-80/18 42/50-80/36 42/50-80/54 42/50-80/90