Subtract 30/72 from 32/12
1st number: 2 8/12, 2nd number: 30/72
32/12 - 30/72 is 9/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 12 × 6 = 72,
32/12 = 32 × 6/12 × 6 = 192/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
30/72 = 30 × 1/72 × 1 = 30/72 - Subtract the two like fractions:
192/72 - 30/72 = 192 - 30/72 = 162/72 - After reducing the fraction, the answer is 9/4
- In mixed form: 21/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 64/12-30/72 32/12-60/72 32/24-30/72 96/12-30/72 32/12-90/72 32/36-30/72 32/60-30/72 32/84-30/72