Question

A book store is offering 10% off your total bill. If you owe $130.50, how much was your bill before the incentive?
a. 150
b. 145
c. 162.34

Answer 1

Answer:

$145

Step-by-step explanation:

10 %offer means at 90% of total cost

So 90%=130.50

100%=x

x=130.50*100/90=145

Answer 2

The bill before the incentive was $ 145

Solution:

Let the actual bill be of Rs ‘a’

A book store is offering 10% off our total bill

$\text { Discount on bill }=\frac{10}{100} \times a$

So, new bill amount to be paid = original amount – discount

$\begin{array}{l}{130.50=a-\frac{10}{100} \times a} \\\\ {130.50=\frac{100 a-10 a}{100}} \\\\ {13050=900} \\\\ {a=\frac{13050}{90}} \\\\ {a=145}\end{array}$

So, the original bill was of $145 Thus Option B is correct

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