Compound Growth and Decay (AQA GCSE Maths): Flashcards

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Compound growth and decay
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Compound growth/decay formula

N=N0×(multiplier)nN = N_0 \times (\text{multiplier})^n

NN in compound formula

Final amount after nn time periods

N0N_0 in compound formula

Initial amount (starting value)

Multiplier for increase

1+1 + percentage as decimal

Multiplier for decrease

11 - percentage as decimal

Per annum meaning

Each year

Multiplier for 5% increase

1.051.05

Multiplier for 26% decrease

0.740.74

Growth vs decay: multiplier value

Growth: >1>1, Decay: <1<1

Compound vs simple interest difference

Compound: % on new amount each time, not original

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