Question

Anushka and her family decided to go out for dinner. Their total bill including 18% tax was Rs. 4,720. What was the actual actual amount of the bill excluding tax?

Answer 1

Hint: In this question let the total bill be a variable, now the total bill is coming up with 18% tax so formulae equation using the question constraint involving the variable to get the answer.

Complete step by step answer:
 In this question we should know the basics of percentage, taxes and its implications.
So first one should assume the value as done in the question as we have to find the original value we should calculate on which terms it has to be found.
Like in the solution we have used 0.18x this is a very important step as it is important to find the value remember the % sign is used then we got this value.
Then we have used some basic operators to get our value which is a very simple way to find the solution.
Let the bill be x.
The tax is 18% so it is equivalent to,
0.18x
The total bill plus tax is,
0.18+x = 1.18x
1.18x = 4720
x = $\dfrac{{4720}}{{1.18}}$
x = 4000
The actual amount is 4000..

Note:
In this question the calculations are easy but one must not be confused by decimals if possible they can be expanded.The basic understanding of % concept always helps. By this way we should be able to solve questions of this type.