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Popular Word Problems >

The size of the rat population of a wharf area grows at a rate of 8% monthly. If there are 400 rats in June, find how many rats should be expected by next June

Solution

T h e s i ze o f t h e r a t p o p u l a t i o n o f a w ha r f a re a g ro w s a t a r a t e o f 8% m o n t h l y . I f t h ere a re 400 r a t s in J u n e, f in d h o w man y r a t s s h o u l d b e e x p ec t e d b y n e x t J u n e

Solution

Amount after addition : 432

Solution steps

Translate the problem into an equation:

x = 400 + 0.08 \cdot 400

x = 400 + 0.08 \cdot 400 : x = 432

Amount after addition : 432

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