Subtract 4/30 from 28/18
1st number: 1 10/18, 2nd number: 4/30
28/18 - 4/30 is 64/45.
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,
28/18 = 28 × 5/18 × 5 = 140/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
4/30 = 4 × 3/30 × 3 = 12/90 - Subtract the two like fractions:
140/90 - 12/90 = 140 - 12/90 = 128/90 - After reducing the fraction, the answer is 64/45
- In mixed form: 119/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/18-4/30 28/18-8/30 28/36-4/30 28/18-4/60 84/18-4/30 28/18-12/30 28/54-4/30 28/18-4/90 28/18-20/30 28/90-4/30 28/18-28/30