Answers

Subtract 70/81 from 2/72

2/72 - 70/81 is -271/324.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 81 is 648
   
   Next, find the equivalent fraction of both fractional numbers with denominator 648
2. For the 1st fraction, since 72 × 9 = 648,
   2/72 = 2 × 9/72 × 9 = 18/648
3. Likewise, for the 2nd fraction, since 81 × 8 = 648,
   70/81 = 70 × 8/81 × 8 = 560/648
4. Subtract the two like fractions:
   18/648 - 560/648 = 18 - 560/648 = -542/648
5. After reducing the fraction, the answer is -271/324

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related: ⁴/₇₂-⁷⁰/₈₁ ⁶/₇₂-⁷⁰/₈₁ ¹⁰/₇₂-⁷⁰/₈₁ ¹⁴/₇₂-⁷⁰/₈₁

Subtract Fractions Calculator