Subtract 63/21 from 12/5
1st number: 2 2/5, 2nd number: 3 0/21
12/5 - 63/21 is -3/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
12/5 = 12 × 21/5 × 21 = 252/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
63/21 = 63 × 5/21 × 5 = 315/105 - Subtract the two like fractions:
252/105 - 315/105 = 252 - 315/105 = -63/105 - After reducing the fraction, the answer is -3/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/5-63/21 12/10-63/21 12/5-63/42 36/5-63/21 12/15-63/21 60/5-63/21 12/25-63/21 84/5-63/21 12/35-63/21