Question

George ate four slices of pizza if this was 25% of slices at the dinner table how many slices were at the table to start with

Answer 1

25% = 1/4
25% of 100%=1/4
you will need to multiply 4 times 4 to see how much pizza was at the table to start with.

So in short your answer is 16.

Answer 2

If 4 was 1/4 of the pizza you do 4x4 to get a total of 16 slices.