-87.29% is the change from 236 to 30
Calculation steps:
[( 30 - 236 ) ÷ 236] x 100 = -87.29%
Formula
Percentage change = [(30 - 236) / 236] x 100
Subtract the new number by the original number
30 - 236 = -206
-206 ÷ 236 = -0.8728813559322034
-0.8728813559322034 x 100 = -87.29%