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12-02-2021
Mathematics

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The ratio of tagged fish to untagged fish was 2 to 9. Ninety fish were tagged. How many fish were untagged

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bclockhart5 bclockhart5

12-02-2021

Answer:

405

Step-by-step explanation:

Since

2 : 9 = 90 : X

Then we know

9/2 = X/90

Multiplying both sides by 90 cancels on the right

90 × (9/2) = (X/90) × 90

90 × (9/2) = X

Then solving for X

X = 90 × (9/2)

X = 405

Therefore

2 : 9 = 90 : 405

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