Subtract 27/45 from 20/84
20/84 - 27/45 is -38/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 45 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 84 × 15 = 1260,
20/84 = 20 × 15/84 × 15 = 300/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
27/45 = 27 × 28/45 × 28 = 756/1260 - Subtract the two like fractions:
300/1260 - 756/1260 = 300 - 756/1260 = -456/1260 - After reducing the fraction, the answer is -38/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/84-27/45 20/84-54/45 20/84-27/90 60/84-27/45 20/84-81/45