Subtract 10/18 from 4/90
4/90 - 10/18 is -23/45.
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,
4/90 = 4 × 1/90 × 1 = 4/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
10/18 = 10 × 5/18 × 5 = 50/90 - Subtract the two like fractions:
4/90 - 50/90 = 4 - 50/90 = -46/90 - After reducing the fraction, the answer is -23/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/90-10/18 4/90-20/18 4/90-10/36 12/90-10/18 4/90-30/18 4/90-10/54 20/90-10/18 4/90-50/18 4/90-10/90 28/90-10/18 4/90-70/18