Subtract 15/27 from 15/30
15/30 - 15/27 is -1/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 27 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 30 × 9 = 270,
15/30 = 15 × 9/30 × 9 = 135/270 - Likewise, for the 2nd fraction, since 27 × 10 = 270,
15/27 = 15 × 10/27 × 10 = 150/270 - Subtract the two like fractions:
135/270 - 150/270 = 135 - 150/270 = -15/270 - After reducing the fraction, the answer is -1/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 15/30-30/27 15/60-15/27 15/30-15/54 45/30-15/27 15/30-45/27 15/90-15/27 15/30-15/81 75/30-15/27 15/30-75/27