class Formulas::LoanPrincipalCalculator
Attributes
apr[RW]
months[RW]
repayment[RW]
Public Instance Methods
divide_by()
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# File lib/formulas/loan_principal_calculator.rb, line 7 def divide_by interest_with_principal - 1 end
interest_with_principal()
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# File lib/formulas/loan_principal_calculator.rb, line 11 def interest_with_principal (1 + (apr / 12)) ** months end
principal()
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# File lib/formulas/loan_principal_calculator.rb, line 15 def principal (((repayment * divide_by) / interest_with_principal) * 12 ) / apr end