Subtract 42/21 from 2/36
1st number: 2/36, 2nd number: 2 0/21
2/36 - 42/21 is -35/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
2/36 = 2 × 7/36 × 7 = 14/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
42/21 = 42 × 12/21 × 12 = 504/252 - Subtract the two like fractions:
14/252 - 504/252 = 14 - 504/252 = -490/252 - After reducing the fraction, the answer is -35/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/36-42/21 2/36-84/21 2/72-42/21 6/36-42/21 2/36-42/63 10/36-42/21 14/36-42/21