Subtract 42/9 from 63/84
1st number: 63/84, 2nd number: 4 6/9
63/84 - 42/9 is -47/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 9 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
63/84 = 63 × 3/84 × 3 = 189/252 - Likewise, for the 2nd fraction, since 9 × 28 = 252,
42/9 = 42 × 28/9 × 28 = 1176/252 - Subtract the two like fractions:
189/252 - 1176/252 = 189 - 1176/252 = -987/252 - After reducing the fraction, the answer is -47/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/84-84/9 63/84-42/18 63/84-42/27 63/84-42/45 63/84-42/63