Information Ratio = $\frac{\text{Alpha}}{\text{Tracking error}}$

Alpha = Return on the portfolio − Return on the benchmark
Alpha = $(\frac{1.12}{1}) - (\frac{2,180}{2,000} - 1)$
Alpha = 3%

Information Ratio = $\frac{0.03}{0.04}$
= 0.75

Note that,
IR = $\frac{(R_p - R_b)}{\sigma(R_p - R_b)} = \frac{(R_p - R_b)}{\text{Tracking error}} = \frac{\text{Active returns}}{\text{Tracking error}} = \frac{\text{Alpha}}{\text{Tracking error}}$