Subtract 4/30 from 3/9
3/9 - 4/30 is 1/5.
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,
3/9 = 3 × 10/9 × 10 = 30/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
4/30 = 4 × 3/30 × 3 = 12/90 - Subtract the two like fractions:
30/90 - 12/90 = 30 - 12/90 = 18/90 - After reducing the fraction, the answer is 1/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/9-4/30 3/9-8/30 3/18-4/30 3/9-4/60 3/9-12/30 3/27-4/30 3/9-4/90 15/9-4/30 3/9-20/30 3/45-4/30 21/9-4/30 3/9-28/30 3/63-4/30