Final answer:
Rahul should multiply the tagged price by 0.91 to find out what he would pay after receiving his 9% loyalty card discount, before tax.
Step-by-step explanation:
Rahul has a loyalty card that gives him a 9% discount at the pharmacy. To find the price he needs to pay, he should multiply the tagged price by a number that represents the remaining percentage after the discount is applied. The calculation for the discount is as follows:
100% - 9% discount = 91% remaining
To use this in a calculation, he should convert the percentage to a decimal which would be 0.91 (since 91% as a decimal is 91/100 = 0.91). Therefore, by multiplying the item's original price by 0.91, he will get the price he needs to pay before tax.
Example: If an item costs $10, he would multiply 10 by 0.91 to get:
$10 x 0.91 = $9.10
This $9.10 is the price he would pay before any taxes are applied.