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Babyangel, maybe you could post future questions below here (click "Post Reply") , so that we can get a "BabyAngel" discussion going, and help you along better.
Percentage increase = (new amount - old amount)/old amount.
Between the years 1999 and 2003 the average text book rose from $45.00 to $67.00/ What is the percent of increase (rounded to the nearest whole number) for the average text book.