Subtract 20/45 from 27/84
27/84 - 20/45 is -31/252.
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,
27/84 = 27 × 15/84 × 15 = 405/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
20/45 = 20 × 28/45 × 28 = 560/1260 - Subtract the two like fractions:
405/1260 - 560/1260 = 405 - 560/1260 = -155/1260 - After reducing the fraction, the answer is -31/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/84-20/45 27/84-40/45 27/84-20/90 81/84-20/45 27/84-60/45