-20.65% is the change from 770 to 611
Calculation steps:
[( 611 - 770 ) ÷ 770] x 100 = -20.65%
Formula
Percentage change = [(611 - 770) / 770] x 100
Subtract the new number by the original number
611 - 770 = -159
-159 ÷ 770 = -0.2064935064935065
-0.2064935064935065 x 100 = -20.65%