Mary buys a leather coat costing 900 at 990 after paying the sales tax calculate the rate of sales tax charged on coat

(990 - 900)/900 = ?

Is 10%

answer is 10% I know u want full answer

To calculate the rate of sales tax charged on the coat, we need to find the difference between the original price and the final price and then divide that difference by the original price.

First, let's calculate the difference between the original price and the final price:

Final Price - Original Price = $990 - $900 = $90

Next, let's calculate the rate of sales tax:

Rate of Sales Tax = (Difference / Original Price) * 100

Rate of Sales Tax = ($90 / $900) * 100

Rate of Sales Tax = (1/10) * 100

Rate of Sales Tax = 10

The rate of sales tax charged on the coat is 10%.