123,456
Y caught 6 fish. X caught 30 fish (5x6). Together they caught 36 fish.
If x caught 5 times as many fish as y, then there were 6 groups of the same number of fish caught, and each group would have been 6 fish if there were 36 fish all together. x must have caught 30 (6 x 5) fish, leaving just 6 for y to have caught.
40-50% of fish are sold each year
Many varieties of fish are caught in the Baltic Sea
70
cannot bo counted
6 of them.
50 centimeters
1,000,000,000,000
about a million
None knows -it is reported in tonnes(weight) -not in numbers of individual fish.
fishery collapse