Subtract 6/28 from 8/42
8/42 - 6/28 is -1/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
8/42 = 8 × 2/42 × 2 = 16/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
6/28 = 6 × 3/28 × 3 = 18/84 - Subtract the two like fractions:
16/84 - 18/84 = 16 - 18/84 = -2/84 - After reducing the fraction, the answer is -1/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/42-6/28 8/42-12/28 8/84-6/28 8/42-6/56 24/42-6/28 8/42-18/28 8/42-6/84 40/42-6/28 8/42-30/28 56/42-6/28 8/42-42/28