Subtract 9/7 from 18/36
1st number: 18/36, 2nd number: 1 2/7
18/36 - 9/7 is -11/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 7 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
18/36 = 18 × 7/36 × 7 = 126/252 - Likewise, for the 2nd fraction, since 7 × 36 = 252,
9/7 = 9 × 36/7 × 36 = 324/252 - Subtract the two like fractions:
126/252 - 324/252 = 126 - 324/252 = -198/252 - After reducing the fraction, the answer is -11/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/36-18/7 18/72-9/7 18/36-9/14 54/36-9/7 18/36-27/7 18/36-9/21 90/36-9/7 18/36-45/7 18/36-9/35 18/36-63/7 18/36-9/49