Subtract 2/18 from 75/21
1st number: 3 12/21, 2nd number: 2/18
75/21 - 2/18 is 218/63.
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,
2/18 = 2 × 7/18 × 7 = 14/126 - Subtract the two like fractions:
450/126 - 14/126 = 450 - 14/126 = 436/126 - After reducing the fraction, the answer is 218/63
- In mixed form: 329/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/21-4/18 75/42-2/18 75/21-2/36 75/21-6/18 75/63-2/18 75/21-2/54 75/21-10/18 75/21-2/90 75/21-14/18