Subtract 81/7 from 18/24
1st number: 18/24, 2nd number: 11 4/7
18/24 - 81/7 is -303/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 7 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
18/24 = 18 × 7/24 × 7 = 126/168 - Likewise, for the 2nd fraction, since 7 × 24 = 168,
81/7 = 81 × 24/7 × 24 = 1944/168 - Subtract the two like fractions:
126/168 - 1944/168 = 126 - 1944/168 = -1818/168 - After reducing the fraction, the answer is -303/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/24-81/7 18/48-81/7 18/24-81/14 54/24-81/7 18/72-81/7 18/24-81/21 90/24-81/7 18/24-81/35 18/24-81/49