Subtract 20/9 from 4/90
1st number: 4/90, 2nd number: 2 2/9
4/90 - 20/9 is -98/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
4/90 = 4 × 1/90 × 1 = 4/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
20/9 = 20 × 10/9 × 10 = 200/90 - Subtract the two like fractions:
4/90 - 200/90 = 4 - 200/90 = -196/90 - After reducing the fraction, the answer is -98/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/90-20/9 4/90-40/9 4/90-20/18 12/90-20/9 4/90-60/9 4/90-20/27 20/90-20/9 4/90-20/45 28/90-20/9 4/90-20/63