What is the value of 11 5/7 + 8 1/7 in simplest form?

The amount of money, in dollars, in an account after t years is given by a = 1000(1.03)^t. the initial deposit into the account was $_^a0 and the interest rate was _a1% per year. only enter numbers in the boxes. do not include any commas or decimal points^t. the initial deposit into the account was $__^a0 and the interest rate is % per year.

A50% increase followed by 33 1/2% decrease

Arational number that is equivalent to -20/4?