Subtract 30/9 from 30/10
1st number: 3 0/10, 2nd number: 3 3/9
30/10 - 30/9 is -1/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
30/10 = 30 × 9/10 × 9 = 270/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
30/9 = 30 × 10/9 × 10 = 300/90 - Subtract the two like fractions:
270/90 - 300/90 = 270 - 300/90 = -30/90 - After reducing the fraction, the answer is -1/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/10-30/9 30/10-60/9 30/20-30/9 30/10-30/18 90/10-30/9 30/10-90/9 30/10-30/27 30/50-30/9 30/10-30/45 30/70-30/9 30/10-30/63