Subtract 20/54 from 15/30
15/30 - 20/54 is 7/54.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 54 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 54 × 5 = 270,
20/54 = 20 × 5/54 × 5 = 100/270 - Subtract the two like fractions:
135/270 - 100/270 = 135 - 100/270 = 35/270 - After reducing the fraction, the answer is 7/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 15/30-40/54 15/60-20/54 45/30-20/54 15/30-60/54 15/90-20/54 75/30-20/54