Subtract 4/15 from 25/42
25/42 - 4/15 is 23/70.
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,
25/42 = 25 × 5/42 × 5 = 125/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
4/15 = 4 × 14/15 × 14 = 56/210 - Subtract the two like fractions:
125/210 - 56/210 = 125 - 56/210 = 69/210 - After reducing the fraction, the answer is 23/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/42-4/15 25/42-8/15 25/84-4/15 25/42-4/30 75/42-4/15 25/42-12/15 25/42-4/45 25/42-20/15 25/42-4/75 25/42-28/15