-89.4% is the change from 283 to 30
Calculation steps:
[( 30 - 283 ) ÷ 283] x 100 = -89.4%
Formula
Percentage change = [(30 - 283) / 283] x 100
Subtract the new number by the original number
30 - 283 = -253
-253 ÷ 283 = -0.8939929328621908
-0.8939929328621908 x 100 = -89.4%