Question

The ratio of fish to turtles in a pond is

20:3. There are 80 fish in the pond.
How many turtles are in the pond?
A 10
B 14
C 12
D 16

Answer 1

Answer: C) 12

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Work Shown:

(# of fish)/(# of turtles) = (# of fish)/(# of turtles)

20/3 = 80/x

20x = 3*80 ........ cross multiply

20x = 240

x = 240/20 ....... divide both sides by 20

x = 12

There are 12 turtles in the pond.

Note how the ratio 80:12 reduces fully to 20:3 after dividing both parts by 4.

Answer 2

12

Explanation:

think of the ratio as a fraction. 20/3 if f is 20 and t is 3 then when f is 80 t should be 12 because 20*4 is 80 and 3*4 is 12