83.76% is the change from 511 to 939
Calculation steps:
[( 939 - 511 ) ÷ 511] x 100 = 83.76%
Formula
Percentage change = [(939 - 511) / 511] x 100
Subtract the new number by the original number
939 - 511 = 428
428 ÷ 511 = 0.837573385518591
0.837573385518591 x 100 = 83.76%