Answer:
12 Days
What is a ratio?
A ratio has two or more numbers that symbolize relation to each other. Ratios are used to compare numbers, and you can compare them using division.
To find the ratio of the problem (days: pages) we can use this equation:
pages read ÷ days it took = pages read each day
Fitting the numbers into the equation:
168 ÷ 7 = 24
So, everyday Kelly reads 24 pages.
To find out how many more days Kelly needs to read, if she reads at the same rate, we can use this equation:
(456 - 168) ÷ 24 = days left
We can use this to check our work:
168 + (24 ×?) = 456
Solving for the first equation:
(456 - 168) ÷ 24 = days left
288 ÷ 24 = 12
Now, we can check our work.
168 + (24 ×?) = 456
Inserting 12 into the equation:
168 + (24 × 12) = 456
168 + 288 = 456
Therefore, to complete the book it will take Kelly 12 more days.