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Maths - Chapter 8 - Formulas - Money & Finance Cheat Sheet by

Formulas from chapter 8: Money & Finance Book: Cambridge IGCSE Maths by Ric Pimental & Terry Wall

Earnings

Net Pay = Gross Income - Deductions
Overtime half is time * 1.5
Double time is the time * 2

Compound Interest Example

P = $70 million
R = 105%
T = 3 years

R = 1.05

I = P x R^T

I = (70,00­0,000 x 0.05^3) - 70,000,000
I = 81,033,750 - 70,000,000

I = $11,03­3,750
 

Percentage Gain & Loss

SP - Selling Price
CP - Cost

SP = CP * ((100 + Profit %) / 100)

CP = ((100 * SP) / 100 + Profit %)

Loss % = Loss / CP
 

Interest

Simple Interest
Compound Interest
I = P x T x R
I = P x R^T
I - Interest
I - Interest
P - Principal Amount
P - Principal Amount
T - Time
T - Time
R - Rate
R - Rate

Simple Interest Example

P - $300
R - 6%
T - 4 years

R - 0.06

300 x 4 x 0.06
= $72
       
 

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