-76.77% is the change from 99 to 23
Calculation steps:
[( 23 - 99 ) ÷ 99] x 100 = -76.77%
Formula
Percentage change = [(23 - 99) / 99] x 100
Subtract the new number by the original number
23 - 99 = -76
-76 ÷ 99 = -0.7676767676767676
-0.7676767676767676 x 100 = -76.77%