Subtract 12/5 from 35/21
1st number: 1 14/21, 2nd number: 2 2/5
35/21 - 12/5 is -11/15.
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,
35/21 = 35 × 5/21 × 5 = 175/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
12/5 = 12 × 21/5 × 21 = 252/105 - Subtract the two like fractions:
175/105 - 252/105 = 175 - 252/105 = -77/105 - After reducing the fraction, the answer is -11/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21-12/5 35/21-24/5 35/42-12/5 35/21-12/10 35/21-36/5 35/63-12/5 35/21-12/15 35/21-60/5 35/21-12/25 35/21-84/5 35/21-12/35