Respuesta :

RevyBreeze

Answer:

10%

Step-by-step explanation:

First, 97.90-89=8.90

8.90/89 = x/100

8.90 x 100 = 890

890/89=10%

Check Answer:

89 x 10%=8.90

89+8.90= 97.90

Therefore, the sales tax percentage is 10%