83.89% is the change from 509 to 936
Calculation steps:
[( 936 - 509 ) ÷ 509] x 100 = 83.89%
Formula
Percentage change = [(936 - 509) / 509] x 100
Subtract the new number by the original number
936 - 509 = 427
427 ÷ 509 = 0.8388998035363457
0.8388998035363457 x 100 = 83.89%