Subtract 18/3 from 15/30
1st number: 15/30, 2nd number: 6 0/3
15/30 - 18/3 is -11/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 3 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
15/30 = 15 × 1/30 × 1 = 15/30 - Likewise, for the 2nd fraction, since 3 × 10 = 30,
18/3 = 18 × 10/3 × 10 = 180/30 - Subtract the two like fractions:
15/30 - 180/30 = 15 - 180/30 = -165/30 - After reducing the fraction, the answer is -11/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 15/30-36/3 15/60-18/3 15/30-18/6 45/30-18/3 15/30-54/3 15/90-18/3 15/30-18/9 75/30-18/3 15/30-90/3 15/30-18/15 15/30-18/21