A rаndоmized dоuble-blinded plаcebо-controlled triаl of benralizumab for prevention of asthma exacerbations in patients with moderate to severe persistent asthma was conducted. At the end of the trial, 256 out of 1358 subjects in the benralizumab arm and 376 out of 1332 subjects in the placebo arm had one or more exacerbations during the trial period. Calculate the relative risk for asthma exacerbations when using benralizumab from this trial.