Subtract 36/9 from 21/4
1st number: 5 1/4, 2nd number: 4 0/9
21/4 - 36/9 is 5/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 9 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 4 × 9 = 36,
21/4 = 21 × 9/4 × 9 = 189/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
36/9 = 36 × 4/9 × 4 = 144/36 - Subtract the two like fractions:
189/36 - 144/36 = 189 - 144/36 = 45/36 - After reducing the fraction, the answer is 5/4
- In mixed form: 11/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/4-36/9 21/4-72/9 21/8-36/9 21/4-36/18 63/4-36/9 21/12-36/9 21/4-36/27 21/20-36/9 21/4-36/45 21/28-36/9 21/4-36/63