Subtract 42/63 from 4/12
4/12 - 42/63 is -1/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 63 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 12 × 21 = 252,
4/12 = 4 × 21/12 × 21 = 84/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
42/63 = 42 × 4/63 × 4 = 168/252 - Subtract the two like fractions:
84/252 - 168/252 = 84 - 168/252 = -84/252 - After reducing the fraction, the answer is -1/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/12-42/63 4/12-84/63 4/24-42/63 4/36-42/63 20/12-42/63 4/60-42/63 28/12-42/63 4/84-42/63