In order to determine the loss or gain in stock price if you don't have access to a percentage change calculator app, all you have to do is follow these three easy steps to determine the percentage change in your stock price;
. firstly you subtract the initial price of the stock from its selling price.
. secondly divide the initial stock price by the difference
. finally multiply your result by 100
Concrete example
If you invested $2000 in a stock which sold at $10 per share, you would get 200 shares and a year later the price per share increased $5 the percentage change in share price would show that the price per share increased 50%. (p2-p1)/p1 * 100 is used to measure percentage change in stock price.