-8.47% is the change from 236 to 216
Calculation steps:
[( 216 - 236 ) ÷ 236] x 100 = -8.47%
Formula
Percentage change = [(216 - 236) / 236] x 100
Subtract the new number by the original number
216 - 236 = -20
-20 ÷ 236 = -0.0847457627118644
-0.0847457627118644 x 100 = -8.47%