Subtract 5/6 from 18/63
18/63 - 5/6 is -23/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 6 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 63 × 2 = 126,
18/63 = 18 × 2/63 × 2 = 36/126 - Likewise, for the 2nd fraction, since 6 × 21 = 126,
5/6 = 5 × 21/6 × 21 = 105/126 - Subtract the two like fractions:
36/126 - 105/126 = 36 - 105/126 = -69/126 - After reducing the fraction, the answer is -23/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/63-5/6 18/63-10/6 18/63-5/12 54/63-5/6 18/63-15/6 18/63-5/18 90/63-5/6 18/63-25/6 18/63-5/30 18/63-35/6 18/63-5/42