-93.64% is the change from 236 to 15
Calculation steps:
[( 15 - 236 ) ÷ 236] x 100 = -93.64%
Formula
Percentage change = [(15 - 236) / 236] x 100
Subtract the new number by the original number
15 - 236 = -221
-221 ÷ 236 = -0.9364406779661016
-0.9364406779661016 x 100 = -93.64%