Subtract 10/42 from 6/18
6/18 - 10/42 is 2/21.
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,
6/18 = 6 × 7/18 × 7 = 42/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
10/42 = 10 × 3/42 × 3 = 30/126 - Subtract the two like fractions:
42/126 - 30/126 = 42 - 30/126 = 12/126 - After reducing the fraction, the answer is 2/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/18-10/42 6/18-20/42 6/36-10/42 6/18-10/84 6/18-30/42 6/54-10/42 30/18-10/42 6/18-50/42 6/90-10/42 42/18-10/42 6/18-70/42