Did I solve for the interest right?

Question

anonymous · Answer

Andy currently has a balance of $4,585.92 in an account he has held for 21 years. He opened the account with an initial deposit of $3,278. What is the simple interest rate on the account? 

I=Prt
4,585.92 = 3,278(r)(21)
4,585.92/63,838 = 68,838/63,838 
0.06661902*100= 6.661902 rounded is 6.7% interest rate

parthkohli · Answer

$\Large \color{purple}{\rightarrow Interest = {P.R.T \over 100} }$

anonymous · Answer

so i got it right?

directrix · Answer

I got 1.9% per year.

directrix · Answer

Interest Rate = 1307.92 / [3278*21] where 1307.92 is the interest amount earned over the 21 year period.
Interet Rate = .019 = 1.9%

directrix · Answer

>I=Prt
>4,585.92 = 3,278(r)(21)

In your work, you put the total accrued amount in for the Interest.
Just the amount of earned interest, $1307.92, should go there.

1307.92 = 3278*21*r 
This will give you an interest rate of 1.9%.

directrix · Answer

Question? @Marzattack

anonymous · Answer

thanks I figured it out and had solved it and got 1.9% I just got helped by teacher. But thanks so much