Subtract 3/54 from 20/45
20/45 - 3/54 is 7/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 54 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 45 × 6 = 270,
20/45 = 20 × 6/45 × 6 = 120/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
3/54 = 3 × 5/54 × 5 = 15/270 - Subtract the two like fractions:
120/270 - 15/270 = 120 - 15/270 = 105/270 - After reducing the fraction, the answer is 7/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/45-3/54 20/45-6/54 20/90-3/54 60/45-3/54 20/45-9/54 20/45-15/54 20/45-21/54