Subtract 3/9 from 9/90
9/90 - 3/9 is -7/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 9 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 9 × 10 = 90,
3/9 = 3 × 10/9 × 10 = 30/90 - Subtract the two like fractions:
9/90 - 30/90 = 9 - 30/90 = -21/90 - After reducing the fraction, the answer is -7/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/90-3/9 9/90-6/9 9/90-3/18 27/90-3/9 9/90-3/27 45/90-3/9 9/90-15/9 9/90-3/45 63/90-3/9 9/90-21/9 9/90-3/63