Subtract 4/42 from 9/12
9/12 - 4/42 is 55/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
9/12 = 9 × 7/12 × 7 = 63/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
4/42 = 4 × 2/42 × 2 = 8/84 - Subtract the two like fractions:
63/84 - 8/84 = 63 - 8/84 = 55/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/12-4/42 9/12-8/42 9/24-4/42 9/12-4/84 27/12-4/42 9/12-12/42 9/36-4/42 45/12-4/42 9/12-20/42 9/60-4/42 63/12-4/42 9/12-28/42 9/84-4/42