Subtract 81/18 from 9/90
1st number: 9/90, 2nd number: 4 9/18
9/90 - 81/18 is -22/5.
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,
9/90 = 9 × 1/90 × 1 = 9/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
81/18 = 81 × 5/18 × 5 = 405/90 - Subtract the two like fractions:
9/90 - 405/90 = 9 - 405/90 = -396/90 - After reducing the fraction, the answer is -22/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/90-81/18 9/90-81/36 27/90-81/18 9/90-81/54 45/90-81/18 9/90-81/90 63/90-81/18