Calculating Reading Percentages and Proportions

In this problem, we need to calculate the total percentage of pages Olivia has read and not read across three different books. Let's start by organizing the data given in the problem statement.

Olivia has read forty pages of a seventy page book, sixty pages of an eighty-five page book, and forty-three pages of a sixty-five page book. Let's sum these up to find the total pages read and the total pages overall.

First, let's calculate the total number of pages read by adding forty, sixty, and forty-three.

Next, we find the total number of pages in all three books by adding seventy, eighty-five, and sixty-five.

Now for Part A, we need to create a proportion to represent the percent of pages read. The problem gives us the template: pages read over total equals x over one hundred.

Substituting our calculated values, we get one hundred forty-three over two hundred twenty equals x over one hundred.