Hi, Diana.
Okay, so the cake weighs 4.5 pounds.
You need to divide it into 6 equal portions.
4.5 ÷ 6 = 4 1/2 ÷ 6 = 9/2 ÷ 6 = 9/2 x 1/6 = 9/12 of a pound
You can then reduce it by dividing the top and bottom by 3 ...9/12 = 3/4
3/4 = .75 so 0.75 pounds is your answer
You could also solve this by just dividing 4.5 by 6 in decimal form and you will get the same answer.