Subtract 21/27 from 15/4
1st number: 3 3/4, 2nd number: 21/27
15/4 - 21/27 is 107/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 27 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 4 × 27 = 108,
15/4 = 15 × 27/4 × 27 = 405/108 - Likewise, for the 2nd fraction, since 27 × 4 = 108,
21/27 = 21 × 4/27 × 4 = 84/108 - Subtract the two like fractions:
405/108 - 84/108 = 405 - 84/108 = 321/108 - After reducing the fraction, the answer is 107/36
- In mixed form: 235/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/4-21/27 15/4-42/27 15/8-21/27 15/4-21/54 45/4-21/27 15/4-63/27 15/12-21/27 15/4-21/81 75/4-21/27 15/20-21/27 15/28-21/27