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If x and y are inversely proportional, what happens to x when y is increased by 25%?

Please answer ASAP!

hellospeedmind  Aug 13, 2018
 #1
avatar
+1

x=1/y

 

say y=2 and x=0.5

 

y*1.25 is 2.5

 

1/(2.5) is 2/5, which is 0.4

 

x has been decreased by 20%

 

hope it helped

Guest Aug 13, 2018
 #2
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+1

x = 1 and y = 1

y = k / x, where k=constant

k = xy = 1

1.25 = k / x

1.25 = 1 / x

1.25x = 1

x = 1 / 1.25

x = 0.8 - so, if y increases by 25% x decreases by 20%.

Guest Aug 13, 2018
edited by Guest  Aug 13, 2018
edited by Guest  Aug 13, 2018
 #3
avatar+88775 
+2

x  = k / y   .....hold  k  constant

 

If y  is increased  by 25%   we have that

 

x  = k /  [ (5/4)y  ]     simplify

 

x = (4/5)k / y

 

Then  x  is 4/5 ths  =  80%  of its orginal value  ( it  decreases  by 20% ) 

 

 

cool cool cool

CPhill  Aug 13, 2018

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