A benchmark index has three stocks priced at $50, $60, and $80. The number of outstanding shares for each is 200000 shares 300,000 shares, and 400,000 shares, respectively. Suppose the price of these three stocks changed to $35, $75, and $85, respectively and number of outstanding shares did not change, what is the price-weighted index return? Please enter the answer as a percent with two decimal places for instance 55.55 for 55.55\%