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if we decrease the price of an objet by 20% and then by 20% also . after two reductions ,is the price of object decreased by 40%?

Respuesta :

No suppose you have 100 rs and you gave 20% of it to someone that is 20 rupees then you are left with 80 rupees .then again someone ask you for 20% of the avaliable money so you will give 20% of 80 rs that is 16 rupees. Together you gave 36 rs and it is not 40% of 100
mjankiewicz
x - starting price

[tex]100\%x-20\%x=x-0.2x[/tex]

[tex]x(1-0.2)^2=(0.8)^2x=0.64x[/tex] Price reductions

[tex]x-0.64x=0.36x=36\%x[/tex]

36% <-- Answer

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