-89.62% is the change from 838 to 87
Calculation steps:
[( 87 - 838 ) ÷ 838] x 100 = -89.62%
Formula
Percentage change = [(87 - 838) / 838] x 100
Subtract the new number by the original number
87 - 838 = -751
-751 ÷ 838 = -0.89618138424821
-0.89618138424821 x 100 = -89.62%