How do I include the Total and Filtered variable in same summary Q and %?

I think I've got it now

suppressPackageStartupMessages(library(dplyr))
df <- data.frame(stringsAsFactors=FALSE,
                        title_type = c("Feature film","Feature film", "TV Movie",
                                                     "Documentary", "Documentary", "Feature film", "Feature film",  "Feature film", "TV Movie", "TV Movie",
                                                     "Feature film", "Feature film", "TV Movie",
                                                     "Documentary", "Documentary", "Feature film", "Feature film",  "Feature film", "TV Movie", "TV Movie"),
                        imdb_rating = c(2, 3, 2, 10, 8, 3, 3, 2, 8, 5, 2, 3, 2, 10, 8, 3, 3,
                                                        2, 8, 5))


df %>%
    mutate(above_mean = imdb_rating > mean(imdb_rating)) %>%
    group_by(title_type) %>%
    summarise(count = n(),
                        pct_of_group_over_mean_of_group =  100 * sum(above_mean) / count,
                        pct_all_films = 100 * count / nrow(.))
#> # A tibble: 3 x 4
#>     title_type count pct_of_group_over_mean_of_group pct_all_films
#>          <chr> <int>                           <dbl>         <dbl>
#> 1  Documentary     4                       100.00000            20
#> 2 Feature film    10                         0.00000            50
#> 3     TV Movie     6                        66.66667            30
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