-96.66% is the change from 899 to 30
Calculation steps:
[( 30 - 899 ) ÷ 899] x 100 = -96.66%
Formula
Percentage change = [(30 - 899) / 899] x 100
Subtract the new number by the original number
30 - 899 = -869
-869 ÷ 899 = -0.9666295884315906
-0.9666295884315906 x 100 = -96.66%