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IMC Math Problem

An aquarium contains 280 tropical fish of various kinds. If 60 more clownfish were added to the aquarium, the proportion of clownfish would be doubled. How many clownfish are in the aquarium?
Original post by Harrykel
An aquarium contains 280 tropical fish of various kinds. If 60 more clownfish were added to the aquarium, the proportion of clownfish would be doubled. How many clownfish are in the aquarium?


What have you got so far?
Original post by Harrykel
An aquarium contains 280 tropical fish of various kinds. If 60 more clownfish were added to the aquarium, the proportion of clownfish would be doubled. How many clownfish are in the aquarium?


Try representing that information in terms of x.

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(edited 7 years ago)
Original post by AcornFalls
Current proportion: x/280
After: x+60/340

2*(x/280) = x+60/340
x/140 = x+60/340
Cross multiplly
340x = 140x + 840
200x = 8400
x =42
So there were originally 42 clownfish, and after adding 60, 102 clownfish


complete answers are frowned upon. *
Original post by AcornFalls
Current proportion:


New poster - please note we don't post full solutions.

Why not use C as the number of clownfish?

You have not defined x btw ...

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