Subtract 12/18 from 7/30
7/30 - 12/18 is -13/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
7/30 = 7 × 3/30 × 3 = 21/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
12/18 = 12 × 5/18 × 5 = 60/90 - Subtract the two like fractions:
21/90 - 60/90 = 21 - 60/90 = -39/90 - After reducing the fraction, the answer is -13/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/30-12/18 7/30-24/18 7/60-12/18 7/30-12/36 21/30-12/18 7/30-36/18 7/90-12/18 7/30-12/54 35/30-12/18 7/30-60/18 7/30-12/90 49/30-12/18 7/30-84/18