Subtract 18/56 from 81/2
1st number: 40 1/2, 2nd number: 18/56
81/2 - 18/56 is 1125/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 56 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 2 × 28 = 56,
81/2 = 81 × 28/2 × 28 = 2268/56 - Likewise, for the 2nd fraction, since 56 × 1 = 56,
18/56 = 18 × 1/56 × 1 = 18/56 - Subtract the two like fractions:
2268/56 - 18/56 = 2268 - 18/56 = 2250/56 - After reducing the fraction, the answer is 1125/28
- In mixed form: 405/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/2-36/56 81/4-18/56 81/2-54/56 81/6-18/56 81/2-90/56 81/10-18/56 81/14-18/56