Subtract 28/45 from 20/27
20/27 - 28/45 is 16/135.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 45 is 135
Next, find the equivalent fraction of both fractional numbers with denominator 135 - For the 1st fraction, since 27 × 5 = 135,
20/27 = 20 × 5/27 × 5 = 100/135 - Likewise, for the 2nd fraction, since 45 × 3 = 135,
28/45 = 28 × 3/45 × 3 = 84/135 - Subtract the two like fractions:
100/135 - 84/135 = 100 - 84/135 = 16/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/27-28/45 20/27-56/45 20/54-28/45 20/27-28/90 60/27-28/45 20/27-84/45 20/81-28/45