Subtract 4/15 from 28/42
28/42 - 4/15 is 2/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
28/42 = 28 × 5/42 × 5 = 140/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
4/15 = 4 × 14/15 × 14 = 56/210 - Subtract the two like fractions:
140/210 - 56/210 = 140 - 56/210 = 84/210 - After reducing the fraction, the answer is 2/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/42-4/15 28/42-8/15 28/84-4/15 28/42-4/30 84/42-4/15 28/42-12/15 28/42-4/45 28/42-20/15 28/42-4/75 28/42-28/15