Subtract 42/5 from 35/21
1st number: 1 14/21, 2nd number: 8 2/5
35/21 - 42/5 is -101/15.
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,
42/5 = 42 × 21/5 × 21 = 882/105 - Subtract the two like fractions:
175/105 - 882/105 = 175 - 882/105 = -707/105 - After reducing the fraction, the answer is -101/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21-42/5 35/21-84/5 35/42-42/5 35/21-42/10 35/63-42/5 35/21-42/15 35/21-42/25 35/21-42/35