-21.36% is the change from 777 to 611
Calculation steps:
[( 611 - 777 ) ÷ 777] x 100 = -21.36%
Formula
Percentage change = [(611 - 777) / 777] x 100
Subtract the new number by the original number
611 - 777 = -166
-166 ÷ 777 = -0.21364221364221364
-0.21364221364221364 x 100 = -21.36%