Subtract 5/18 from 7/30
7/30 - 5/18 is -2/45.
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,
5/18 = 5 × 5/18 × 5 = 25/90 - Subtract the two like fractions:
21/90 - 25/90 = 21 - 25/90 = -4/90 - After reducing the fraction, the answer is -2/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/30-5/18 7/30-10/18 7/60-5/18 7/30-5/36 21/30-5/18 7/30-15/18 7/90-5/18 7/30-5/54 35/30-5/18 7/30-25/18 7/30-5/90 49/30-5/18 7/30-35/18