Subtract 7/9 from 9/90
9/90 - 7/9 is -61/90.
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,
7/9 = 7 × 10/9 × 10 = 70/90 - Subtract the two like fractions:
9/90 - 70/90 = 9 - 70/90 = -61/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/90-7/9 9/90-14/9 9/90-7/18 27/90-7/9 9/90-21/9 9/90-7/27 45/90-7/9 9/90-35/9 9/90-7/45 63/90-7/9 9/90-49/9 9/90-7/63