Subtract 21/54 from 36/21
1st number: 1 15/21, 2nd number: 21/54
36/21 - 21/54 is 167/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
36/21 = 36 × 18/21 × 18 = 648/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
21/54 = 21 × 7/54 × 7 = 147/378 - Subtract the two like fractions:
648/378 - 147/378 = 648 - 147/378 = 501/378 - After reducing the fraction, the answer is 167/126
- In mixed form: 141/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/21-21/54 36/21-42/54 36/42-21/54 36/21-63/54 36/63-21/54