So when your divided fraction by fraction you switch the division sign in the middle to multiplication. For example 3/4 x 1/8 you multiply the 3 and the 8 which is diagonal from each other and the 4 by the 1 which gets you 24/4 .
If they start with 6 fish on month 1 and it triples every month, by month 12 there will be 1,062,882 fish.
Answer: y=mx+b...... y= 2x+1
12•6= 72
If you were finding volume then you would multiply it my 8 too, but you need to find area