The amount of tax on a chair was $3.60. the tax rate was 5%. find the original price of the chair. bianca solved the problem below. find bianca’s error. 0.05(3.60) = original price the original price is $0.18.

Given:
tax value = 3.60
tax rate = 5%

To solve for the tax value, we use this formula:

Tax value  = Original price * tax rate

Since the original price is missing, we derive the formula from the above formula:

Original price = tax value ÷ tax rate
Original price = 3.60 ÷ 5%
Original price = 72

The original price is 72.

72 x 5% = 3.60