-39.14% is the change from 833 to 507
Calculation steps:
[( 507 - 833 ) ÷ 833] x 100 = -39.14%
Formula
Percentage change = [(507 - 833) / 833] x 100
Subtract the new number by the original number
507 - 833 = -326
-326 ÷ 833 = -0.39135654261704683
-0.39135654261704683 x 100 = -39.14%