Subtract 10/28 from 3/42
3/42 - 10/28 is -2/7.
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,
3/42 = 3 × 2/42 × 2 = 6/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
10/28 = 10 × 3/28 × 3 = 30/84 - Subtract the two like fractions:
6/84 - 30/84 = 6 - 30/84 = -24/84 - After reducing the fraction, the answer is -2/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/42-10/28 3/42-20/28 3/84-10/28 3/42-10/56 9/42-10/28 3/42-30/28 3/42-10/84 15/42-10/28 3/42-50/28 21/42-10/28 3/42-70/28