Subtract 75/36 from 12/21
1st number: 12/21, 2nd number: 2 3/36
12/21 - 75/36 is -127/84.
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,
12/21 = 12 × 12/21 × 12 = 144/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
75/36 = 75 × 7/36 × 7 = 525/252 - Subtract the two like fractions:
144/252 - 525/252 = 144 - 525/252 = -381/252 - After reducing the fraction, the answer is -127/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21-75/36 12/42-75/36 12/21-75/72 36/21-75/36 12/63-75/36 60/21-75/36 84/21-75/36