You multiply the numerator and denominator of 3/4 with 3 and multiply 1/3 with 4 on the bottom and top and after you get 36/144 you simplify it and you get 1/4 so thats your answer
9 3/4 is heavier than 9 5/8. If you multiply 3/4 by 2/2, you will get 6/8, which is greater than 5/8.
1 minute = 60 seconds
300 seconds / 60 seconds = 5 minutes
I think $10 per share. it depends on how many shares you buy and sell