Subtract 63/12 from 8/42
1st number: 8/42, 2nd number: 5 3/12
8/42 - 63/12 is -425/84.
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,
8/42 = 8 × 2/42 × 2 = 16/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
63/12 = 63 × 7/12 × 7 = 441/84 - Subtract the two like fractions:
16/84 - 441/84 = 16 - 441/84 = -425/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/42-63/12 8/84-63/12 8/42-63/24 24/42-63/12 8/42-63/36 40/42-63/12 8/42-63/60 56/42-63/12 8/42-63/84