Subtract 4/80 from 72/9
1st number: 8 0/9, 2nd number: 4/80
72/9 - 4/80 is 159/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 9 × 80 = 720,
72/9 = 72 × 80/9 × 80 = 5760/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
4/80 = 4 × 9/80 × 9 = 36/720 - Subtract the two like fractions:
5760/720 - 36/720 = 5760 - 36/720 = 5724/720 - After reducing the fraction, the answer is 159/20
- In mixed form: 719/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/9-8/80 72/18-4/80 72/9-12/80 72/27-4/80 72/9-20/80 72/45-4/80 72/9-28/80 72/63-4/80