You deposit $2200 into three separate bank accounts for each pay 3% annual interest. how much interest does each account earn after 6 years?

The formula to find the amount is

Here A = amount

P is the principal

r is the rate

n is the number of years

Then to find the interest we subtract principal from amount.

Interest = A - P

Here

P= 2200, r = 3% = 0.03 , n = 6 years

Hence the interest earned = 2626.92-2200 = $426.92

Now if the total of $2200 was deposited in three banks then each account earns

Each account earns $142.31

the answer is 21%.