Subtract 2/28 from 15/42
15/42 - 2/28 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,
15/42 = 15 × 2/42 × 2 = 30/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
2/28 = 2 × 3/28 × 3 = 6/84 - Subtract the two like fractions:
30/84 - 6/84 = 30 - 6/84 = 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: 30/42-2/28 15/42-4/28 15/84-2/28 15/42-2/56 45/42-2/28 15/42-6/28 15/42-2/84 75/42-2/28 15/42-10/28 15/42-14/28