-89.62% is the change from 963 to 100
Calculation steps:
[( 100 - 963 ) ÷ 963] x 100 = -89.62%
Formula
Percentage change = [(100 - 963) / 963] x 100
Subtract the new number by the original number
100 - 963 = -863
-863 ÷ 963 = -0.8961578400830738
-0.8961578400830738 x 100 = -89.62%