Answer:
i = 2,5 %
Step-by-step explanation:
Topic: Simple Interest
you have to be familiar with the concept of simple interest, this interest does not capitalize the interest made in a previous period of time, in other words you dont make more interest by the interest already gained in some period of time.
The Equation for calculating the interest is

where
I = ammount of gained interest
P = ammount of money invested
n = number of periods of investment
i = simple interest rate
having this equation you can find i, so them we have that
=
= 0.025 = 2.5 %
so the simple interest rate is 2.5%