Subtract 30/18 from 35/21
1st number: 1 14/21, 2nd number: 1 12/18
35/21 - 30/18 is 0/1.
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,
35/21 = 35 × 6/21 × 6 = 210/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
30/18 = 30 × 7/18 × 7 = 210/126 - Subtract the two like fractions:
210/126 - 210/126 = 210 - 210/126 = 0/126 - The answer is 0
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21-30/18 35/21-60/18 35/42-30/18 35/21-30/36 35/21-90/18 35/63-30/18 35/21-30/54 35/21-30/90