-33.73% is the change from 765 to 507
Calculation steps:
[( 507 - 765 ) ÷ 765] x 100 = -33.73%
Formula
Percentage change = [(507 - 765) / 765] x 100
Subtract the new number by the original number
507 - 765 = -258
-258 ÷ 765 = -0.33725490196078434
-0.33725490196078434 x 100 = -33.73%