Subtract 42/50 from 4/18
4/18 - 42/50 is -139/225.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 50 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 18 × 25 = 450,
4/18 = 4 × 25/18 × 25 = 100/450 - Likewise, for the 2nd fraction, since 50 × 9 = 450,
42/50 = 42 × 9/50 × 9 = 378/450 - Subtract the two like fractions:
100/450 - 378/450 = 100 - 378/450 = -278/450 - After reducing the fraction, the answer is -139/225
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/18-42/50 4/18-84/50 4/36-42/50 12/18-42/50 4/54-42/50 20/18-42/50 4/90-42/50 28/18-42/50