Subtract 1/12 from 15/42
15/42 - 1/12 is 23/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 12 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 12 × 7 = 84,
1/12 = 1 × 7/12 × 7 = 7/84 - Subtract the two like fractions:
30/84 - 7/84 = 30 - 7/84 = 23/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/42-1/12 15/42-2/12 15/84-1/12 15/42-1/24 45/42-1/12 15/42-3/12 15/42-1/36 75/42-1/12 15/42-5/12 15/42-1/60 15/42-7/12 15/42-1/84