Subtract 6/36 from 30/21
1st number: 1 9/21, 2nd number: 6/36
30/21 - 6/36 is 53/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 21 × 12 = 252,
30/21 = 30 × 12/21 × 12 = 360/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
6/36 = 6 × 7/36 × 7 = 42/252 - Subtract the two like fractions:
360/252 - 42/252 = 360 - 42/252 = 318/252 - After reducing the fraction, the answer is 53/42
- In mixed form: 111/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21-6/36 30/21-12/36 30/42-6/36 30/21-6/72 90/21-6/36 30/21-18/36 30/63-6/36 30/21-30/36 30/21-42/36