Mr johnson stayed four nights at a hotel . his bill 2as $725 before the sales tax of 6% was added . how much was the sale tax?

Let us first concentrate on the information’s that are already given in the question. Based on those information’s the answer to the question can be easily found.
Bill amount for Mr. Johnson before sales tax = $725
Percentage of sales tax taken = 6%
Then
Amount of sales tax = (6/100) * 725
                                 = 4350/100 dollars
                                 = 43.5 dollars
So the amount of sales tax that had to be given is $43.5. I hope the procedure for doing this problem is clear to you.