Subtract 2/30 from 30/21
1st number: 1 9/21, 2nd number: 2/30
30/21 - 2/30 is 143/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
30/21 = 30 × 10/21 × 10 = 300/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
2/30 = 2 × 7/30 × 7 = 14/210 - Subtract the two like fractions:
300/210 - 14/210 = 300 - 14/210 = 286/210 - After reducing the fraction, the answer is 143/105
- In mixed form: 138/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21-2/30 30/21-4/30 30/42-2/30 30/21-2/60 90/21-2/30 30/21-6/30 30/63-2/30 30/21-2/90 30/21-10/30 30/21-14/30