Subtract 36/21 from 4/12
1st number: 4/12, 2nd number: 1 15/21
4/12 - 36/21 is -29/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
4/12 = 4 × 7/12 × 7 = 28/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
36/21 = 36 × 4/21 × 4 = 144/84 - Subtract the two like fractions:
28/84 - 144/84 = 28 - 144/84 = -116/84 - After reducing the fraction, the answer is -29/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/12-36/21 4/12-72/21 4/24-36/21 4/12-36/42 4/36-36/21 4/12-36/63 20/12-36/21 4/60-36/21 28/12-36/21 4/84-36/21