Subtract 16/27 from 21/84
21/84 - 16/27 is -37/108.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 27 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 84 × 9 = 756,
21/84 = 21 × 9/84 × 9 = 189/756 - Likewise, for the 2nd fraction, since 27 × 28 = 756,
16/27 = 16 × 28/27 × 28 = 448/756 - Subtract the two like fractions:
189/756 - 448/756 = 189 - 448/756 = -259/756 - After reducing the fraction, the answer is -37/108
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84-16/27 21/84-32/27 21/84-16/54 63/84-16/27 21/84-48/27 21/84-16/81 21/84-80/27