Subtract 80/9 from 18/70
1st number: 18/70, 2nd number: 8 8/9
18/70 - 80/9 is -2719/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 9 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
18/70 = 18 × 9/70 × 9 = 162/630 - Likewise, for the 2nd fraction, since 9 × 70 = 630,
80/9 = 80 × 70/9 × 70 = 5600/630 - Subtract the two like fractions:
162/630 - 5600/630 = 162 - 5600/630 = -5438/630 - After reducing the fraction, the answer is -2719/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/70-80/9 18/70-80/18 54/70-80/9 18/70-80/27 90/70-80/9 18/70-80/45 18/70-80/63