Subtract 4/45 from 20/27
20/27 - 4/45 is 88/135.
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,
4/45 = 4 × 3/45 × 3 = 12/135 - Subtract the two like fractions:
100/135 - 12/135 = 100 - 12/135 = 88/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/27-4/45 20/27-8/45 20/54-4/45 20/27-4/90 60/27-4/45 20/27-12/45 20/81-4/45 20/27-20/45 20/27-28/45