Incorporating geom_text into geom_waffle

[cholo.trem]

Hello. I have created the following waffle chart using ggplot:

library(tidyverse)
library(waffle)
graf3 <- data.frame(
  tamaño = c("Micro","Pequeño", "Mediano", "Grande"),
  porcentaje = c(42,13,37,8),
  stringsAsFactors = FALSE)

ggplot(data = graf3, 
       aes(fill = tamaño, values = porcentaje))  +
  geom_waffle(n_rows = 10, size = 1, flip = TRUE, color="white") +
  coord_equal() +
  theme_minimal() +
  theme_enhance_waffle() +
  scale_fill_brewer(palette = "Set2")

I want to insert the text of the variable "porcentaje" into the graph. I have tried to do so but it has produced very ugly results:

ggplot(data = graf3, 
       aes(fill = tamaño, values = porcentaje)) +
  geom_text(aes(x=tamaño, y=porcentaje, label=porcentaje)) +
  geom_waffle(n_rows = 10, size = 1, flip = TRUE, color="white") +
  coord_equal() +
  theme_minimal() +
  theme_enhance_waffle() +
  scale_fill_brewer(palette = "Set2")

I would be very thankful for any advice on how to solve the issue.