Subtract 28/90 from 20/8
1st number: 2 4/8, 2nd number: 28/90
20/8 - 28/90 is 197/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 8 × 45 = 360,
20/8 = 20 × 45/8 × 45 = 900/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
28/90 = 28 × 4/90 × 4 = 112/360 - Subtract the two like fractions:
900/360 - 112/360 = 900 - 112/360 = 788/360 - After reducing the fraction, the answer is 197/90
- In mixed form: 217/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/8-28/90 20/8-56/90 20/16-28/90 60/8-28/90 20/8-84/90 20/24-28/90 20/40-28/90 20/56-28/90