Maths T1 Financial
Help!
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| Compound Interest Formula | A = P ( 1 + r) ^n or
A = P ( 1 + r/n) ^n.t ( n = periods per year and t = years)
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| A = P ( 1 + r) ^n where A = | Amount (in total including the Principle and all Interest)
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| A = P ( 1 + r) ^n where P = | Principle (Initial Amount)
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| A = P ( 1 + r) ^n where r = | Rate % for the time period of n ( where 5% = 0.05)
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| A = P ( 1 + r) ^n where n = | Number of Periods (usually years)
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| Interest Earned value formula | I = A - P
I value = Amount value - Principle value
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| Sub-yearly period interest rate formula | rate(sub) = rate(year) / periods per year
Bi-yr = 6mths = ry / 2 ; Quarterly 3mths = ry / 4 ; Monthly = ry /12 ; Weekly= ry / 52 ;
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| Principle Required for Amount Formula | P = A / ( 1 + r) ^n
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| Number of Required Periods Formula | n = log ( A / P) ) / log ( 1 + r )
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