-83.96% is the change from 187 to 30
Calculation steps:
[( 30 - 187 ) ÷ 187] x 100 = -83.96%
Formula
Percentage change = [(30 - 187) / 187] x 100
Subtract the new number by the original number
30 - 187 = -157
-157 ÷ 187 = -0.839572192513369
-0.839572192513369 x 100 = -83.96%