Subtract 9/80 from 72/45
1st number: 1 27/45, 2nd number: 9/80
72/45 - 9/80 is 119/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 45 × 16 = 720,
72/45 = 72 × 16/45 × 16 = 1152/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
9/80 = 9 × 9/80 × 9 = 81/720 - Subtract the two like fractions:
1152/720 - 81/720 = 1152 - 81/720 = 1071/720 - After reducing the fraction, the answer is 119/80
- In mixed form: 139/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/45-18/80 72/90-9/80 72/45-27/80 72/45-45/80 72/45-63/80