Subtract 20/84 from 4/27
4/27 - 20/84 is -17/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 84 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 27 × 28 = 756,
4/27 = 4 × 28/27 × 28 = 112/756 - Likewise, for the 2nd fraction, since 84 × 9 = 756,
20/84 = 20 × 9/84 × 9 = 180/756 - Subtract the two like fractions:
112/756 - 180/756 = 112 - 180/756 = -68/756 - After reducing the fraction, the answer is -17/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/27-20/84 4/27-40/84 4/54-20/84 12/27-20/84 4/27-60/84 4/81-20/84 20/27-20/84 28/27-20/84