Subtract 24/12 from 9/42
1st number: 9/42, 2nd number: 2 0/12
9/42 - 24/12 is -25/14.
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,
9/42 = 9 × 2/42 × 2 = 18/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
24/12 = 24 × 7/12 × 7 = 168/84 - Subtract the two like fractions:
18/84 - 168/84 = 18 - 168/84 = -150/84 - After reducing the fraction, the answer is -25/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/42-24/12 9/42-48/12 9/84-24/12 27/42-24/12 9/42-72/12 9/42-24/36 45/42-24/12 9/42-24/60 63/42-24/12 9/42-24/84