Subtract 80/9 from 21/36
1st number: 21/36, 2nd number: 8 8/9
21/36 - 80/9 is -299/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 9 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 36 × 1 = 36,
21/36 = 21 × 1/36 × 1 = 21/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
80/9 = 80 × 4/9 × 4 = 320/36 - Subtract the two like fractions:
21/36 - 320/36 = 21 - 320/36 = -299/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/36-80/9 21/72-80/9 21/36-80/18 63/36-80/9 21/36-80/27 21/36-80/45 21/36-80/63