Subtract 18/72 from 84/12
1st number: 7 0/12, 2nd number: 18/72
84/12 - 18/72 is 27/4.
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,
84/12 = 84 × 6/12 × 6 = 504/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
18/72 = 18 × 1/72 × 1 = 18/72 - Subtract the two like fractions:
504/72 - 18/72 = 504 - 18/72 = 486/72 - After reducing the fraction, the answer is 27/4
- In mixed form: 63/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/12-36/72 84/24-18/72 84/12-54/72 84/36-18/72 84/12-90/72 84/60-18/72