-89.55% is the change from 947 to 99
Calculation steps:
[( 99 - 947 ) ÷ 947] x 100 = -89.55%
Formula
Percentage change = [(99 - 947) / 947] x 100
Subtract the new number by the original number
99 - 947 = -848
-848 ÷ 947 = -0.8954593453009504
-0.8954593453009504 x 100 = -89.55%