Subtract 21/27 from 21/80
21/80 - 21/27 is -371/720.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 27 is 2160
Next, find the equivalent fraction of both fractional numbers with denominator 2160 - For the 1st fraction, since 80 × 27 = 2160,
21/80 = 21 × 27/80 × 27 = 567/2160 - Likewise, for the 2nd fraction, since 27 × 80 = 2160,
21/27 = 21 × 80/27 × 80 = 1680/2160 - Subtract the two like fractions:
567/2160 - 1680/2160 = 567 - 1680/2160 = -1113/2160 - After reducing the fraction, the answer is -371/720
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/80-21/27 21/80-42/27 21/80-21/54 63/80-21/27 21/80-63/27 21/80-21/81