Sales tax rate as a percentage = 3%
Step-by-step explanation:
The cost of the item = $380
The sales tax = $11.40
Sales tax rate as a percentage = sales tax/the cost of the item × 100
Sales tax rate = sales tax/the cost of the item = 11.4/380
Sales tax rate = 0.03
Sales tax rate as a percentage = 0.03 × 100
Sales tax rate as a percentage = 3%