This solution could be improved by showing the beginning steps. The first sentence immediately raises the question, "Where did three-fourths come from?" This is available to one who has already solved the problem. This is known as an inverted presentation. The expert solves the problem and then in a very natural manner presents the solution starting with the last thing that the expert dealt with. This does not reflect well the actual problem solving process the expert used. The reader is then required to determine how to start the solution.
The following is the analytical solution presented in The Mathematics Teacher.
The starting equation can be difficult for many students (aka overload of the working memory). The immediate question is, "How was it obtained?"
For students and teachers the first hurdle in solving a problem is translating the words in the problem statement into an equation. The TMT presentation does not provide sufficient help for this challenging task.
The following solution presents a particularly clean solution of the problem.
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The following solution presentation is in a form that a wide audience can read and understand. There is no need to solve the solution. The processes the problem solver used are shown.
Note the consistent use of mathematics in solving this problem.
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