Subtract 80/9 from 7/90
1st number: 7/90, 2nd number: 8 8/9
7/90 - 80/9 is -793/90.
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,
7/90 = 7 × 1/90 × 1 = 7/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
80/9 = 80 × 10/9 × 10 = 800/90 - Subtract the two like fractions:
7/90 - 800/90 = 7 - 800/90 = -793/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/90-80/9 7/90-80/18 21/90-80/9 7/90-80/27 35/90-80/9 7/90-80/45 49/90-80/9 7/90-80/63