Subtract 84/36 from 21/5
1st number: 4 1/5, 2nd number: 2 12/36
21/5 - 84/36 is 28/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 5 × 36 = 180,
21/5 = 21 × 36/5 × 36 = 756/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
84/36 = 84 × 5/36 × 5 = 420/180 - Subtract the two like fractions:
756/180 - 420/180 = 756 - 420/180 = 336/180 - After reducing the fraction, the answer is 28/15
- In mixed form: 113/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/5-84/36 21/10-84/36 21/5-84/72 63/5-84/36 21/15-84/36 21/25-84/36 21/35-84/36