Final answer:
To find the equivalent expression for 2/3 - 4/5, convert both fractions to have a common denominator of 15, resulting in 10/15 - 12/15, which equals -2/15.
Step-by-step explanation:
To find the equivalent expression for 2/3 - 4/5, we need a common denominator. The smallest common denominator for 3 and 5 is 15. We then convert 2/3 to an equivalent fraction with a denominator of 15 by multiplying the numerator and denominator by 5, resulting in 10/15. Similarly, we convert 4/5 to 12/15 by multiplying by 3. Now, we subtract the two fractions: 10/15 - 12/15 = -2/15.