Subtract 18/9 from 18/28
1st number: 18/28, 2nd number: 2 0/9
18/28 - 18/9 is -19/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 9 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
18/28 = 18 × 9/28 × 9 = 162/252 - Likewise, for the 2nd fraction, since 9 × 28 = 252,
18/9 = 18 × 28/9 × 28 = 504/252 - Subtract the two like fractions:
162/252 - 504/252 = 162 - 504/252 = -342/252 - After reducing the fraction, the answer is -19/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/28-18/9 18/28-36/9 18/56-18/9 54/28-18/9 18/28-54/9 18/84-18/9 18/28-18/27 90/28-18/9 18/28-90/9 18/28-18/45 18/28-18/63