Subtract 4/84 from 15/42
15/42 - 4/84 is 13/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 84 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 84 × 1 = 84,
4/84 = 4 × 1/84 × 1 = 4/84 - Subtract the two like fractions:
30/84 - 4/84 = 30 - 4/84 = 26/84 - After reducing the fraction, the answer is 13/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/42-4/84 15/42-8/84 15/84-4/84 45/42-4/84 15/42-12/84 75/42-4/84 15/42-20/84 15/42-28/84