Subtract 9/42 from 5/18
5/18 - 9/42 is 4/63.
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,
9/42 = 9 × 3/42 × 3 = 27/126 - Subtract the two like fractions:
35/126 - 27/126 = 35 - 27/126 = 8/126 - After reducing the fraction, the answer is 4/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/18-9/42 5/18-18/42 5/36-9/42 5/18-9/84 15/18-9/42 5/18-27/42 5/54-9/42 25/18-9/42 5/18-45/42 5/90-9/42 35/18-9/42 5/18-63/42