Subtract 12/18 from 50/21
1st number: 2 8/21, 2nd number: 12/18
50/21 - 12/18 is 12/7.
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,
50/21 = 50 × 6/21 × 6 = 300/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
12/18 = 12 × 7/18 × 7 = 84/126 - Subtract the two like fractions:
300/126 - 84/126 = 300 - 84/126 = 216/126 - After reducing the fraction, the answer is 12/7
- In mixed form: 15/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/21-24/18 50/42-12/18 50/21-12/36 50/21-36/18 50/63-12/18 50/21-12/54 50/21-60/18 50/21-12/90 50/21-84/18