Subtract 30/9 from 90/8
1st number: 11 2/8, 2nd number: 3 3/9
90/8 - 30/9 is 95/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 9 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,
90/8 = 90 × 9/8 × 9 = 810/72 - Likewise, for the 2nd fraction, since 9 × 8 = 72,
30/9 = 30 × 8/9 × 8 = 240/72 - Subtract the two like fractions:
810/72 - 240/72 = 810 - 240/72 = 570/72 - After reducing the fraction, the answer is 95/12
- In mixed form: 711/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/8-60/9 90/16-30/9 90/8-30/18 90/8-90/9 90/24-30/9 90/8-30/27 90/40-30/9 90/8-30/45 90/56-30/9 90/8-30/63