Question 762942: Sorry but I cant get it right (and Im weak in math)
I have a loan for 21200 and I have to pay 400$ monthly for 6 years. total of 28800
so the question is how much percent / value interest I am paying back?
Thanks and regards
Found 3 solutions by jim_thompson5910, MathLover1, MathTherapy:
Answer by jim_thompson5910(35256)   (Show Source):
You can put this solution on YOUR website! Difference: 28800 - 21200 = 7600
You must pay back $7,600 in interest (on top of the $21,200 principal)
Now divide by the original principal: 7600/21200 = 0.35849056603773 = 35.849% = 35.85%
This means that your loan has an effective interest rate of 35.85% (simple example: person A loans person B $100. Person B would then pay back person A $100 plus $35.85 in interest)
Edit: the other poster has a better solution since I forgot to factor in the fact that this was done over 6 years (not 1)
Answer by MathLover1(20849)  (Show Source):
Answer by MathTherapy(10552)  (Show Source):
You can put this solution on YOUR website! Sorry but I cant get it right (and Im weak in math)
I have a loan for 21200 and I have to pay 400$ monthly for 6 years. total of 28800
so the question is how much percent / value interest I am paying back?
Thanks and regards
SI, or simple interest = 28,800 - 21,200, or $7,600
P = $21,200
T = 6 (in years)
R = annual interest rate
We then get:  -----  ------ 
R, or annual interest rate =  , or  , or  %
You can do the check!!
Further help is available, online or in-person, for a fee, obviously. Send comments, “thank-yous,” and inquiries to “D” at MathMadEzy@aol.com
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