Subtract 20/27 from 18/20
18/20 - 20/27 is 43/270.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 27 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 20 × 27 = 540,
18/20 = 18 × 27/20 × 27 = 486/540 - Likewise, for the 2nd fraction, since 27 × 20 = 540,
20/27 = 20 × 20/27 × 20 = 400/540 - Subtract the two like fractions:
486/540 - 400/540 = 486 - 400/540 = 86/540 - After reducing the fraction, the answer is 43/270
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20-20/27 18/20-40/27 18/40-20/27 18/20-20/54 54/20-20/27 18/20-60/27 18/60-20/27 18/20-20/81 90/20-20/27