Subtract 72/81 from 4/2
1st number: 2 0/2, 2nd number: 72/81
4/2 - 72/81 is 10/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 2 × 81 = 162,
4/2 = 4 × 81/2 × 81 = 324/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
72/81 = 72 × 2/81 × 2 = 144/162 - Subtract the two like fractions:
324/162 - 144/162 = 324 - 144/162 = 180/162 - After reducing the fraction, the answer is 10/9
- In mixed form: 11/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/2-72/81 12/2-72/81 4/6-72/81 20/2-72/81 4/10-72/81 28/2-72/81 4/14-72/81