Subtract 6/5 from 12/21
1st number: 12/21, 2nd number: 1 1/5
12/21 - 6/5 is -22/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
12/21 = 12 × 5/21 × 5 = 60/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
6/5 = 6 × 21/5 × 21 = 126/105 - Subtract the two like fractions:
60/105 - 126/105 = 60 - 126/105 = -66/105 - After reducing the fraction, the answer is -22/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21-6/5 12/21-12/5 12/42-6/5 12/21-6/10 36/21-6/5 12/21-18/5 12/63-6/5 12/21-6/15 60/21-6/5 12/21-30/5 12/21-6/25 84/21-6/5 12/21-42/5 12/21-6/35