-84.38% is the change from 192 to 30
Calculation steps:
[( 30 - 192 ) ÷ 192] x 100 = -84.38%
Formula
Percentage change = [(30 - 192) / 192] x 100
Subtract the new number by the original number
30 - 192 = -162
-162 ÷ 192 = -0.84375
-0.84375 x 100 = -84.38%