Subtract 20/54 from 12/20
12/20 - 20/54 is 31/135.
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,
12/20 = 12 × 27/20 × 27 = 324/540 - Likewise, for the 2nd fraction, since 54 × 10 = 540,
20/54 = 20 × 10/54 × 10 = 200/540 - Subtract the two like fractions:
324/540 - 200/540 = 324 - 200/540 = 124/540 - After reducing the fraction, the answer is 31/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/20-20/54 12/20-40/54 12/40-20/54 36/20-20/54 12/20-60/54 12/60-20/54 60/20-20/54 84/20-20/54