Type-I error of a max test

Let $X_1,X_2,X_3,X_4$ be a random sample of size 4 from a population having uniform distribution over the interval $(0,\theta)$, where $\theta > 0$ is an unknown parameter. Let $X_{(4)} = \max\{X_1,X_2,X_3,X_4\}$. To test $H_0: \theta = 1$ against $H_1: \theta = 0.1$, consider the critical region that rejects $H_0$ if $X_{(4)} < 0.3$. Let $p$ be the probability of the Type-I error. Then $100 p$ equals ____________ (rounded off to two decimal places).