-89.4% is the change from 217 to 23
Calculation steps:
[( 23 - 217 ) ÷ 217] x 100 = -89.4%
Formula
Percentage change = [(23 - 217) / 217] x 100
Subtract the new number by the original number
23 - 217 = -194
-194 ÷ 217 = -0.8940092165898618
-0.8940092165898618 x 100 = -89.4%