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