Louvers

The company charges for office equipment louvers total 262 Eur. From the delivery bill is obvious that the louvers are 76 Eur expensive than their installation.

What percentage of the total charged is the installation of louvers?

Correct result:

p =  35.5 %

Solution:

z+m=262 z=76+m p=mx⋅100 p=262−762⋅262⋅100=35.5%z+m =262 \ \\ z = 76 + m \ \\ p = \dfrac{m}{x}\cdot 100 \ \\ p = \dfrac{ 262-76}{ 2\cdot 262 } \cdot 100 = 35.5 \%

z+m =262
z = 76 + m

m+z = 262
m-z = -76

m = 93
z = 169

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