Subtract 21/5 from 50/18
1st number: 2 14/18, 2nd number: 4 1/5
50/18 - 21/5 is -64/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 5 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
50/18 = 50 × 5/18 × 5 = 250/90 - Likewise, for the 2nd fraction, since 5 × 18 = 90,
21/5 = 21 × 18/5 × 18 = 378/90 - Subtract the two like fractions:
250/90 - 378/90 = 250 - 378/90 = -128/90 - After reducing the fraction, the answer is -64/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/18-42/5 50/36-21/5 50/18-21/10 50/18-63/5 50/54-21/5 50/18-21/15 50/90-21/5 50/18-21/25 50/18-21/35