Subtract 4/18 from 28/90
28/90 - 4/18 is 4/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
28/90 = 28 × 1/90 × 1 = 28/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
4/18 = 4 × 5/18 × 5 = 20/90 - Subtract the two like fractions:
28/90 - 20/90 = 28 - 20/90 = 8/90 - After reducing the fraction, the answer is 4/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/90-4/18 28/90-8/18 28/90-4/36 84/90-4/18 28/90-12/18 28/90-4/54 28/90-20/18 28/90-4/90 28/90-28/18