Subtract 18/36 from 9/30
9/30 - 18/36 is -1/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 30 × 6 = 180,
9/30 = 9 × 6/30 × 6 = 54/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
18/36 = 18 × 5/36 × 5 = 90/180 - Subtract the two like fractions:
54/180 - 90/180 = 54 - 90/180 = -36/180 - 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: 18/30-18/36 9/60-18/36 9/30-18/72 27/30-18/36 9/30-54/36 9/90-18/36 45/30-18/36 9/30-90/36 63/30-18/36