From any initial number, three successive 50% losses would create a total loss of 87.5%. let's use a starting point of 100 so you can hopefully comprehend this: if it fell 50% one day that would leave 50, minus 50% the next day would leave 25, and losing 50% the third day would leave 12.5 remaining. This means that three successive losses of 50% would create a total loss of 87.5%, not 150%. This is very basic math.
I never give buy/sell/hold recommendations or financial advice. Be careful with your investment dollars, especially in the pink sheets.