Question 1029363
Take it one step at a time. 

She went from 1000 words to 3600 words. That's 2600 words typed on Tuesday. 

2600 words * 1hr/300words = 8 2/3 hours typing. 


The lesson here is how to think of the rate 300 words per hour. If I asked you how many words can she type in 4 hours, you'd say 

4 hours * 300 words/hour = 1200. And if you notice, hours/hours cancel and we are left with an answer in number of words. 

For our problem, we have words, and need to get to hours. We have to flip 300words/hour to 1hr/300words, which will solve the conversion properly.