Subtract 40/54 from 9/20
9/20 - 40/54 is -157/540.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 54 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 20 × 27 = 540,
9/20 = 9 × 27/20 × 27 = 243/540 - Likewise, for the 2nd fraction, since 54 × 10 = 540,
40/54 = 40 × 10/54 × 10 = 400/540 - Subtract the two like fractions:
243/540 - 400/540 = 243 - 400/540 = -157/540
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/20-40/54 9/20-80/54 9/40-40/54 27/20-40/54 9/60-40/54 45/20-40/54 63/20-40/54