Subtract 30/72 from 8/18
8/18 - 30/72 is 1/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
8/18 = 8 × 4/18 × 4 = 32/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
30/72 = 30 × 1/72 × 1 = 30/72 - Subtract the two like fractions:
32/72 - 30/72 = 32 - 30/72 = 2/72 - After reducing the fraction, the answer is 1/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/18-30/72 8/18-60/72 8/36-30/72 24/18-30/72 8/18-90/72 8/54-30/72 40/18-30/72 8/90-30/72 56/18-30/72