Subtract 1/90 from 4/9
4/9 - 1/90 is 13/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 9 × 10 = 90,
4/9 = 4 × 10/9 × 10 = 40/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
1/90 = 1 × 1/90 × 1 = 1/90 - Subtract the two like fractions:
40/90 - 1/90 = 40 - 1/90 = 39/90 - After reducing the fraction, the answer is 13/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/9-1/90 4/9-2/90 4/18-1/90 12/9-1/90 4/9-3/90 4/27-1/90 20/9-1/90 4/9-5/90 4/45-1/90 28/9-1/90 4/9-7/90 4/63-1/90