Subtract 50/63 from 12/21
12/21 - 50/63 is -2/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
12/21 = 12 × 3/21 × 3 = 36/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
50/63 = 50 × 1/63 × 1 = 50/63 - Subtract the two like fractions:
36/63 - 50/63 = 36 - 50/63 = -14/63 - After reducing the fraction, the answer is -2/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21-50/63 12/42-50/63 36/21-50/63 12/63-50/63 60/21-50/63 84/21-50/63