Subtract 45/54 from 20/25
20/25 - 45/54 is -1/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 54 is 1350
Next, find the equivalent fraction of both fractional numbers with denominator 1350 - For the 1st fraction, since 25 × 54 = 1350,
20/25 = 20 × 54/25 × 54 = 1080/1350 - Likewise, for the 2nd fraction, since 54 × 25 = 1350,
45/54 = 45 × 25/54 × 25 = 1125/1350 - Subtract the two like fractions:
1080/1350 - 1125/1350 = 1080 - 1125/1350 = -45/1350 - After reducing the fraction, the answer is -1/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/25-45/54 20/25-90/54 20/50-45/54 60/25-45/54 20/75-45/54