If we convert 8% into a decimal we get 0.08,
So,
0.08x2400 = 192
Now we have to subtract $192 since that's how much it dropped.
2400-192 = $2208
Now if we add the same percentage (8%), we do the same thing from step 1.
8/100 = 0.08
2208x0.08 = 176
Now we add,
2208 + 176 = $2384