Subtract 21/12 from 24/63
1st number: 24/63, 2nd number: 1 9/12
24/63 - 21/12 is -115/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 12 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 63 × 4 = 252,
24/63 = 24 × 4/63 × 4 = 96/252 - Likewise, for the 2nd fraction, since 12 × 21 = 252,
21/12 = 21 × 21/12 × 21 = 441/252 - Subtract the two like fractions:
96/252 - 441/252 = 96 - 441/252 = -345/252 - After reducing the fraction, the answer is -115/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/63-21/12 24/63-42/12 24/63-21/24 72/63-21/12 24/63-63/12 24/63-21/36 24/63-21/60 24/63-21/84