Subtract 30/27 from 20/72
1st number: 20/72, 2nd number: 1 3/27
20/72 - 30/27 is -5/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 27 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 72 × 3 = 216,
20/72 = 20 × 3/72 × 3 = 60/216 - Likewise, for the 2nd fraction, since 27 × 8 = 216,
30/27 = 30 × 8/27 × 8 = 240/216 - Subtract the two like fractions:
60/216 - 240/216 = 60 - 240/216 = -180/216 - After reducing the fraction, the answer is -5/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/72-30/27 20/72-60/27 20/72-30/54 60/72-30/27 20/72-90/27 20/72-30/81