Subtract 2/90 from 20/18
1st number: 1 2/18, 2nd number: 2/90
20/18 - 2/90 is 49/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
20/18 = 20 × 5/18 × 5 = 100/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
2/90 = 2 × 1/90 × 1 = 2/90 - Subtract the two like fractions:
100/90 - 2/90 = 100 - 2/90 = 98/90 - After reducing the fraction, the answer is 49/45
- In mixed form: 14/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/18-2/90 20/18-4/90 20/36-2/90 60/18-2/90 20/18-6/90 20/54-2/90 20/18-10/90 20/90-2/90 20/18-14/90