-83.9% is the change from 963 to 155
Calculation steps:
[( 155 - 963 ) ÷ 963] x 100 = -83.9%
Formula
Percentage change = [(155 - 963) / 963] x 100
Subtract the new number by the original number
155 - 963 = -808
-808 ÷ 963 = -0.8390446521287642
-0.8390446521287642 x 100 = -83.9%