Subtract 20/5 from 7/9
1st number: 7/9, 2nd number: 4 0/5
7/9 - 20/5 is -29/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 5 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 9 × 5 = 45,
7/9 = 7 × 5/9 × 5 = 35/45 - Likewise, for the 2nd fraction, since 5 × 9 = 45,
20/5 = 20 × 9/5 × 9 = 180/45 - Subtract the two like fractions:
35/45 - 180/45 = 35 - 180/45 = -145/45 - After reducing the fraction, the answer is -29/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/9-20/5 7/9-40/5 7/18-20/5 7/9-20/10 21/9-20/5 7/9-60/5 7/27-20/5 7/9-20/15 35/9-20/5 7/45-20/5 7/9-20/25 49/9-20/5 7/63-20/5 7/9-20/35