Calculate % change in each observation

Question

I need to calculate the % change in values for Argentina for the entire column and store it in a data frame:

% change is 2nd value- 1st value/ 1st value *100 say if a column has
30
40
%change is 40-30/30 =33.33%

Answer 1

Pls read abot how to make a reproducible example

Supposing df is your data.frame. Using dplyr:

library(dplyr)
df %>%
    mutate(change = (Argentina - lead(Argentina)) / Argentina * 100

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