Subtract 30/80 from 8/36
8/36 - 30/80 is -11/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 36 × 20 = 720,
8/36 = 8 × 20/36 × 20 = 160/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
30/80 = 30 × 9/80 × 9 = 270/720 - Subtract the two like fractions:
160/720 - 270/720 = 160 - 270/720 = -110/720 - After reducing the fraction, the answer is -11/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/36-30/80 8/36-60/80 8/72-30/80 24/36-30/80 8/36-90/80 40/36-30/80 56/36-30/80