Subtract 2/80 from 72/18
1st number: 4 0/18, 2nd number: 2/80
72/18 - 2/80 is 159/40.
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,
2/80 = 2 × 9/80 × 9 = 18/720 - Subtract the two like fractions:
2880/720 - 18/720 = 2880 - 18/720 = 2862/720 - After reducing the fraction, the answer is 159/40
- In mixed form: 339/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/18-4/80 72/36-2/80 72/18-6/80 72/54-2/80 72/18-10/80 72/90-2/80 72/18-14/80