hi : ) i found this so i hope this !
"we first find value of tax in dollars.
the difference between the two prices is: 23. 54 - 22 = 1.54
therefore the sales tax in dollars is 1.54
the tax % will be (amount of tax / original cost price ) Γ 100
(1.54 / 22) Γ 100 β (0.07) Γ 100 = 7
so the tax rate is 7%
we can double check the answer.
7 % of 22 β (7/100) Γ 22 β 0.07 Γ 22 = 1.54
22 + 1.54 = 23.54"