Subtract 28/30 from 4/18
4/18 - 28/30 is -32/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
4/18 = 4 × 5/18 × 5 = 20/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
28/30 = 28 × 3/30 × 3 = 84/90 - Subtract the two like fractions:
20/90 - 84/90 = 20 - 84/90 = -64/90 - After reducing the fraction, the answer is -32/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/18-28/30 4/18-56/30 4/36-28/30 4/18-28/60 12/18-28/30 4/18-84/30 4/54-28/30 4/18-28/90 20/18-28/30 4/90-28/30 28/18-28/30