Respostas

2013-11-07T20:19:58-02:00
O  produto = x 20% x = 0,20x Acréscimo de 20% = x + 0,20x = 1,20x   2º acréscimo de 15%   15% de 1,20x = 0,15 .  1,20x = 0,18x 1,20x + 0,18x = 1,38x                                                                                 O produto  ficou com os  acréscimos = 1,38x Decréscimo de 10% -10% . (1,38x) = -0,10. (1,38x) = -0,1380 è 1,3800x –                                                                                                                                                                                                        0,1380x                                                                                                                                                                                                                                           1,2420x          -20% de 1,2420x                     -0,20   .   1,2420x   = -0,2484x 1,2420x – 0,2484x  O produto ficou com os decréscimos  = 0,9936x   Conclusão = x + (20%x +15% de 1,20x) – [(10%de1,38x) + (20% de 1,2484x)]                        x+(1,20x + 1,38x)  - [( 0,1380x + 0,2484x)]                        x +(2,58x) – ( 0,3864x)                        x + 2,1936x è houve um aumento de 219,36 % de aumento.      
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