Subtract 84/9 from 28/18
1st number: 1 10/18, 2nd number: 9 3/9
28/18 - 84/9 is -70/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 9 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 18 × 1 = 18,
28/18 = 28 × 1/18 × 1 = 28/18 - Likewise, for the 2nd fraction, since 9 × 2 = 18,
84/9 = 84 × 2/9 × 2 = 168/18 - Subtract the two like fractions:
28/18 - 168/18 = 28 - 168/18 = -140/18 - After reducing the fraction, the answer is -70/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/18-84/9 28/36-84/9 28/18-84/18 84/18-84/9 28/54-84/9 28/18-84/27 28/90-84/9 28/18-84/45 28/18-84/63