Subtract 30/80 from 4/36
4/36 - 30/80 is -19/72.
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,
4/36 = 4 × 20/36 × 20 = 80/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
30/80 = 30 × 9/80 × 9 = 270/720 - Subtract the two like fractions:
80/720 - 270/720 = 80 - 270/720 = -190/720 - After reducing the fraction, the answer is -19/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/36-30/80 4/36-60/80 4/72-30/80 12/36-30/80 4/36-90/80 20/36-30/80 28/36-30/80