Subtract 63/42 from 5/18
1st number: 5/18, 2nd number: 1 21/42
5/18 - 63/42 is -11/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
5/18 = 5 × 7/18 × 7 = 35/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
63/42 = 63 × 3/42 × 3 = 189/126 - Subtract the two like fractions:
35/126 - 189/126 = 35 - 189/126 = -154/126 - After reducing the fraction, the answer is -11/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/18-63/42 5/36-63/42 5/18-63/84 15/18-63/42 5/54-63/42 25/18-63/42 5/90-63/42 35/18-63/42