Subtract 6/18 from 75/21
1st number: 3 12/21, 2nd number: 6/18
75/21 - 6/18 is 68/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 21 × 6 = 126,
75/21 = 75 × 6/21 × 6 = 450/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
6/18 = 6 × 7/18 × 7 = 42/126 - Subtract the two like fractions:
450/126 - 42/126 = 450 - 42/126 = 408/126 - After reducing the fraction, the answer is 68/21
- In mixed form: 35/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/21-12/18 75/42-6/18 75/21-6/36 75/63-6/18 75/21-6/54 75/21-30/18 75/21-6/90 75/21-42/18