if you’re turning it into a percentage it would be: -190%
remember when you’re converting to a percentage just multiply 100 to the decimal.
assuming x to be sue's score in the first game, the score in her second game would be (x-10) and (x-10-13).
also, we know that the average score for these three bowling games was 162 so we can write:
therefore, sue scored 173 in her first game.