Subtract 3/5 from 30/18
1st number: 1 12/18, 2nd number: 3/5
30/18 - 3/5 is 16/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 5 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
30/18 = 30 × 5/18 × 5 = 150/90 - Likewise, for the 2nd fraction, since 5 × 18 = 90,
3/5 = 3 × 18/5 × 18 = 54/90 - Subtract the two like fractions:
150/90 - 54/90 = 150 - 54/90 = 96/90 - After reducing the fraction, the answer is 16/15
- In mixed form: 11/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/18-3/5 30/18-6/5 30/36-3/5 30/18-3/10 90/18-3/5 30/18-9/5 30/54-3/5 30/18-3/15 30/18-15/5 30/90-3/5 30/18-3/25 30/18-21/5 30/18-3/35