Subtract 12/72 from 90/80
1st number: 1 10/80, 2nd number: 12/72
90/80 - 12/72 is 23/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 72 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 72 × 10 = 720,
12/72 = 12 × 10/72 × 10 = 120/720 - Subtract the two like fractions:
810/720 - 120/720 = 810 - 120/720 = 690/720 - After reducing the fraction, the answer is 23/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/80-24/72 90/80-36/72 90/80-60/72 90/80-84/72