Subtract 12/9 from 40/30
1st number: 1 10/30, 2nd number: 1 3/9
40/30 - 12/9 is 0/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
40/30 = 40 × 3/30 × 3 = 120/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
12/9 = 12 × 10/9 × 10 = 120/90 - Subtract the two like fractions:
120/90 - 120/90 = 120 - 120/90 = 0/90 - 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: 80/30-12/9 40/30-24/9 40/60-12/9 40/30-12/18 40/30-36/9 40/90-12/9 40/30-12/27 40/30-60/9 40/30-12/45 40/30-84/9 40/30-12/63