Subtract 1/30 from 21/9
1st number: 2 3/9, 2nd number: 1/30
21/9 - 1/30 is 23/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 9 × 10 = 90,
21/9 = 21 × 10/9 × 10 = 210/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
1/30 = 1 × 3/30 × 3 = 3/90 - Subtract the two like fractions:
210/90 - 3/90 = 210 - 3/90 = 207/90 - After reducing the fraction, the answer is 23/10
- In mixed form: 23/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/9-1/30 21/9-2/30 21/18-1/30 21/9-1/60 63/9-1/30 21/9-3/30 21/27-1/30 21/9-1/90 21/9-5/30 21/45-1/30 21/9-7/30 21/63-1/30