"Consider the project balances for a typical investment project with a service life of four years.
The 'An' for years 0 through 4 are: ($)
-12,000
--
--
1,556
--
The symbol '--' represents missing numbers, not 0.
The project balance at the end of the given years (n = 0 through 4) are: ($)
-12,000
-9,900
-5,500
-4,400
194
Determine the interest rate used in computing the project balance. Enter your answer as a percentage between 0 and 100."