Subtract 1/80 from 72/18
1st number: 4 0/18, 2nd number: 1/80
72/18 - 1/80 is 319/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 18 × 40 = 720,
72/18 = 72 × 40/18 × 40 = 2880/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
1/80 = 1 × 9/80 × 9 = 9/720 - Subtract the two like fractions:
2880/720 - 9/720 = 2880 - 9/720 = 2871/720 - After reducing the fraction, the answer is 319/80
- In mixed form: 379/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/18-2/80 72/36-1/80 72/18-3/80 72/54-1/80 72/18-5/80 72/90-1/80 72/18-7/80