Let's say that the number of cups of strawberries Jada needs for the whole cake is x. The problem says that 3/4 of the cake is equal to 1 cup of strawberries, so we can set up the following equation:
3/4x = 1
We can solve this equation by multiplying both sides of the equation with 4/3, so it cancels out with the 3/4. Make sure to do this to both sides!
So, you get:
x=4/3
Jada needs 4/3 cups of strawberries for the whole cake.