-88.8% is the change from 777 to 87
Calculation steps:
[( 87 - 777 ) ÷ 777] x 100 = -88.8%
Formula
Percentage change = [(87 - 777) / 777] x 100
Subtract the new number by the original number
87 - 777 = -690
-690 ÷ 777 = -0.888030888030888
-0.888030888030888 x 100 = -88.8%