Darryl has written 60 percent, or 12 pages, of his history report. Darryl wants to figure out how many pages he needs to write. Darryl’s work is shown below.

Question

Step 1:  Write 60 percent as a ratio.  

Step 2:  Write an equivalent ratio using the number of pages done so far.  

Step 3:  Rewrite as: .

Step 4:   

What mistake did Darryl make?   

In Step 1, Darryl should have written the ratio as .

In Step 2, Darryl should have put 12 in the denominator.

In Step 3, Darryl should have multiplied 60 and 100.

In Step 4, Darryl multiplied 12 and 100 incorrectly.

Answer 1

60/100=12/?

60÷5/(100÷5)=12/20.

Step 4 was wrong, last answer.