please its urgent?

Question

i have to do a project in which they have given

calculate each instalment

calculate instalment charges under instalment plan

calculate apparent rate of interest= instalment charges*100/ balance*time
explain

Answer 1

p = iP/(1 - 1/(1 + i)^n)
where
p = installment payment
i = interest for a period (usually a month)
P = principal, or amount financed
n = number of payments, usually monthly

C = np - P
where C = installment charges

Apparent rate of interest I:
I = 100*C/(nP)