Subtract 63/12 from 7/42
1st number: 7/42, 2nd number: 5 3/12
7/42 - 63/12 is -61/12.
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,
7/42 = 7 × 2/42 × 2 = 14/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
63/12 = 63 × 7/12 × 7 = 441/84 - Subtract the two like fractions:
14/84 - 441/84 = 14 - 441/84 = -427/84 - After reducing the fraction, the answer is -61/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/42-63/12 7/84-63/12 7/42-63/24 21/42-63/12 7/42-63/36 35/42-63/12 7/42-63/60 49/42-63/12 7/42-63/84