Subtract 81/4 from 18/8
1st number: 2 2/8, 2nd number: 20 1/4
18/8 - 81/4 is -18/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 4 is 8
Next, find the equivalent fraction of both fractional numbers with denominator 8 - For the 1st fraction, since 8 × 1 = 8,
18/8 = 18 × 1/8 × 1 = 18/8 - Likewise, for the 2nd fraction, since 4 × 2 = 8,
81/4 = 81 × 2/4 × 2 = 162/8 - Subtract the two like fractions:
18/8 - 162/8 = 18 - 162/8 = -144/8 - After reducing the fraction, the answer is -18/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/8-81/4 18/16-81/4 18/8-81/8 54/8-81/4 18/24-81/4 18/8-81/12 90/8-81/4 18/40-81/4 18/8-81/20 18/56-81/4 18/8-81/28