Subtract 8/18 from 90/80
1st number: 1 10/80, 2nd number: 8/18
90/80 - 8/18 is 49/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 18 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
90/80 = 90 × 9/80 × 9 = 810/720 - Likewise, for the 2nd fraction, since 18 × 40 = 720,
8/18 = 8 × 40/18 × 40 = 320/720 - Subtract the two like fractions:
810/720 - 320/720 = 810 - 320/720 = 490/720 - After reducing the fraction, the answer is 49/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/80-16/18 90/80-8/36 90/80-24/18 90/80-8/54 90/80-40/18 90/80-8/90 90/80-56/18