Subtract 20/90 from 28/5
1st number: 5 3/5, 2nd number: 20/90
28/5 - 20/90 is 242/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
28/5 = 28 × 18/5 × 18 = 504/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
20/90 = 20 × 1/90 × 1 = 20/90 - Subtract the two like fractions:
504/90 - 20/90 = 504 - 20/90 = 484/90 - After reducing the fraction, the answer is 242/45
- In mixed form: 517/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/5-20/90 28/5-40/90 28/10-20/90 84/5-20/90 28/5-60/90 28/15-20/90 28/25-20/90 28/35-20/90