Subtract 10/90 from 9/10
9/10 - 10/90 is 71/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
9/10 = 9 × 9/10 × 9 = 81/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
10/90 = 10 × 1/90 × 1 = 10/90 - Subtract the two like fractions:
81/90 - 10/90 = 81 - 10/90 = 71/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/10-10/90 9/10-20/90 9/20-10/90 27/10-10/90 9/10-30/90 9/30-10/90 45/10-10/90 9/10-50/90 9/50-10/90 63/10-10/90 9/10-70/90 9/70-10/90