Subtract 70/18 from 20/9
1st number: 2 2/9, 2nd number: 3 16/18
20/9 - 70/18 is -5/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 18 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 9 × 2 = 18,
20/9 = 20 × 2/9 × 2 = 40/18 - Likewise, for the 2nd fraction, since 18 × 1 = 18,
70/18 = 70 × 1/18 × 1 = 70/18 - Subtract the two like fractions:
40/18 - 70/18 = 40 - 70/18 = -30/18 - After reducing the fraction, the answer is -5/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/9-70/18 20/18-70/18 20/9-70/36 60/9-70/18 20/27-70/18 20/9-70/54 20/45-70/18 20/9-70/90 20/63-70/18