Subtract 7/9 from 80/30
1st number: 2 20/30, 2nd number: 7/9
80/30 - 7/9 is 17/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
80/30 = 80 × 3/30 × 3 = 240/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
7/9 = 7 × 10/9 × 10 = 70/90 - Subtract the two like fractions:
240/90 - 70/90 = 240 - 70/90 = 170/90 - After reducing the fraction, the answer is 17/9
- In mixed form: 18/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/30-14/9 80/60-7/9 80/30-7/18 80/30-21/9 80/90-7/9 80/30-7/27 80/30-35/9 80/30-7/45 80/30-49/9 80/30-7/63