Are you asking about the percent of change?if so the answer is 33.3%.
More = Addition
"Twice a Number" = Multiplication (specifically by two)

Since the order of operations tell us to multiply before we add, we can simplify

.
1: 8 faces and 9 with the base 9 vertices and 16 edges
2: 3 faces and 5 with the bases 6 vertices and 9 edges
3: 3 faces and 4 with the base 4 vertices and 6 edges
Answer:
The answer depends on how much each cake costs.
Step-by-step explanation:
For example, divide (price of one cake) by $675. Thats how many cakes she made.
Answer x=1/5
6x-3=-9x
-3=-15x
-3/-15x=1/5