Subtract 35/36 from 42/21
1st number: 2 0/21, 2nd number: 35/36
42/21 - 35/36 is 37/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 21 × 12 = 252,
42/21 = 42 × 12/21 × 12 = 504/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
35/36 = 35 × 7/36 × 7 = 245/252 - Subtract the two like fractions:
504/252 - 245/252 = 504 - 245/252 = 259/252 - After reducing the fraction, the answer is 37/36
- In mixed form: 11/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21-35/36 42/21-70/36 42/21-35/72 42/63-35/36