Subtract 21/27 from 27/80
27/80 - 21/27 is -317/720.
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,
27/80 = 27 × 27/80 × 27 = 729/2160 - Likewise, for the 2nd fraction, since 27 × 80 = 2160,
21/27 = 21 × 80/27 × 80 = 1680/2160 - Subtract the two like fractions:
729/2160 - 1680/2160 = 729 - 1680/2160 = -951/2160 - After reducing the fraction, the answer is -317/720
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/80-21/27 27/80-42/27 27/80-21/54 81/80-21/27 27/80-63/27 27/80-21/81