-34.88% is the change from 777 to 506
Calculation steps:
[( 506 - 777 ) ÷ 777] x 100 = -34.88%
Formula
Percentage change = [(506 - 777) / 777] x 100
Subtract the new number by the original number
506 - 777 = -271
-271 ÷ 777 = -0.3487773487773488
-0.3487773487773488 x 100 = -34.88%