Subtract 9/10 from 1/90
1/90 - 9/10 is -8/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
1/90 = 1 × 1/90 × 1 = 1/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
9/10 = 9 × 9/10 × 9 = 81/90 - Subtract the two like fractions:
1/90 - 81/90 = 1 - 81/90 = -80/90 - After reducing the fraction, the answer is -8/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/90-9/10 1/90-18/10 1/90-9/20 3/90-9/10 1/90-27/10 1/90-9/30 5/90-9/10 1/90-45/10 1/90-9/50 7/90-9/10 1/90-63/10 1/90-9/70