85.07% is the change from 509 to 942
Calculation steps:
[( 942 - 509 ) ÷ 509] x 100 = 85.07%
Formula
Percentage change = [(942 - 509) / 509] x 100
Subtract the new number by the original number
942 - 509 = 433
433 ÷ 509 = 0.8506876227897839
0.8506876227897839 x 100 = 85.07%