-34.58% is the change from 775 to 507
Calculation steps:
[( 507 - 775 ) ÷ 775] x 100 = -34.58%
Formula
Percentage change = [(507 - 775) / 775] x 100
Subtract the new number by the original number
507 - 775 = -268
-268 ÷ 775 = -0.34580645161290324
-0.34580645161290324 x 100 = -34.58%