Question

in the same year election there were 83.7 million voters, where as in the next year there were 129.3 million voters. find the percent change in the number of voters

Answer 1

54.48028673%

((y2 - y1) / y1)*100 = your percentage change.
((129.3 - 83.7) / 83.7)*100 = 54.48028673%

Answer 2

to 2 decimal places would be 54.48%