Subtract 6/4 from 81/63
1st number: 1 18/63, 2nd number: 1 2/4
81/63 - 6/4 is -3/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 4 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 63 × 4 = 252,
81/63 = 81 × 4/63 × 4 = 324/252 - Likewise, for the 2nd fraction, since 4 × 63 = 252,
6/4 = 6 × 63/4 × 63 = 378/252 - Subtract the two like fractions:
324/252 - 378/252 = 324 - 378/252 = -54/252 - After reducing the fraction, the answer is -3/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/63-12/4 81/63-6/8 81/63-18/4 81/63-6/12 81/63-30/4 81/63-6/20 81/63-42/4 81/63-6/28