State \(X\) has a sales tax rate of \(k\) percent on all purchases and State \(Y\) has a sales tax rate of \(n\) percent

[M7MBA]

State \(X\) has a sales tax rate of \(k\) percent on all purchases and State \(Y\) has a sales tax rate of \(n\) percent on all purchases. What is the value of \(k - n ?\)

(1) The sales tax on a \(\$15\) purchase is \(30\) cents more in State \(X\) than in State \(Y.\)
(2) The sales tax rate in State \(X\) is \(1.4\) times the sales tax rate in State \(Y.\)

[spoiler]OA=A[/spoiler]

Source: Official Guide