-89.83% is the change from 973 to 99
Calculation steps:
[( 99 - 973 ) ÷ 973] x 100 = -89.83%
Formula
Percentage change = [(99 - 973) / 973] x 100
Subtract the new number by the original number
99 - 973 = -874
-874 ÷ 973 = -0.8982528263103803
-0.8982528263103803 x 100 = -89.83%