The technical sophistication of commercial fishing equipment increased steadily from 1960 through 2010, which enabled...

on June 14, 2020

video explanation

Hello, a possible video explanation for this would be great. I was stuck between A and C. I looked at the written explanation but it isn't making much sense to me.

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Shunhe on June 15, 2020

Hi @kassidee,

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Now, let me try to explain this again and see if it helps. So we know that from 1960 to 2010, the fishing industry got more and more % of total fish by weight every year. So it might have gone from 10% to 15% to 20% etc.

Then, we’re told that by actual total weight (in pounds or kg or whatever), it only increased until 1995, but not after. So that means we see an increase in % of total fish by weight, but not in total weight.

So let’s do an example. Say there’s 10 pounds of fish. And we get 40%, which is 4 total pounds of fish.. And then the next year, we get 50%, which is a higher %, but we still only get 4 total pounds of fish. That means there exist only 8 pounds of fish overall. So the total number of pounds of fish decreased. And this is what (C) is telling us. Total fish amount by weight went down in that second period, since the percents were still increasing, but the total numbers didn’t.

Hope this helps! Feel free to ask any other questions that you might have.