SOLUTION: There were 200 fish in an aquarium, 99% of which were red. How many red fish must be removed to make the percentage of red fish 98%?

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Question 1069237: There were 200 fish in an aquarium, 99% of which were red. How many red fish must be removed to make the percentage of red fish 98%?
Found 3 solutions by josgarithmetic, MathTherapy, Alan3354:
Answer by josgarithmetic(39625)   (Show Source): You can put this solution on YOUR website!
The aquarium has 198 red fish among the 200 fish.

Remove n of the red fish to reach 98% red fish in the aquarium.



Remove one red fish.
Answer by MathTherapy(10555)   (Show Source): You can put this solution on YOUR website!

There were 200 fish in an aquarium, 99% of which were red. How many red fish must be removed to make the percentage of red fish 98%?
Number of red fish to remove in order to have 98% red fish:  

Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
 There were 200 fish in an aquarium, 99% of which were red. How many red fish must be removed to make the percentage of red fish 98%?

----------

Remove n red fish.

Then,

198-n/(200-n) = 0.98

198-n = 196 - 0.98n

2 = 0.02n

n = 100

----------------

--> 98 red fish out of 100 fish

 

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