-34.41% is the change from 773 to 507
Calculation steps:
[( 507 - 773 ) ÷ 773] x 100 = -34.41%
Formula
Percentage change = [(507 - 773) / 773] x 100
Subtract the new number by the original number
507 - 773 = -266
-266 ÷ 773 = -0.34411384217335056
-0.34411384217335056 x 100 = -34.41%