Subtract 1/42 from 8/12
8/12 - 1/42 is 9/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
8/12 = 8 × 7/12 × 7 = 56/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
1/42 = 1 × 2/42 × 2 = 2/84 - Subtract the two like fractions:
56/84 - 2/84 = 56 - 2/84 = 54/84 - After reducing the fraction, the answer is 9/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/12-1/42 8/12-2/42 8/24-1/42 8/12-1/84 24/12-1/42 8/12-3/42 8/36-1/42 40/12-1/42 8/12-5/42 8/60-1/42 56/12-1/42 8/12-7/42 8/84-1/42