Subtract 36/9 from 12/30
1st number: 12/30, 2nd number: 4 0/9
12/30 - 36/9 is -18/5.
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,
12/30 = 12 × 3/30 × 3 = 36/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
36/9 = 36 × 10/9 × 10 = 360/90 - Subtract the two like fractions:
36/90 - 360/90 = 36 - 360/90 = -324/90 - After reducing the fraction, the answer is -18/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/30-36/9 12/30-72/9 12/60-36/9 12/30-36/18 36/30-36/9 12/90-36/9 12/30-36/27 60/30-36/9 12/30-36/45 84/30-36/9 12/30-36/63