-80% is the change from 115 to 23
Calculation steps:
[( 23 - 115 ) ÷ 115] x 100 = -80%
Formula
Percentage change = [(23 - 115) / 115] x 100
Subtract the new number by the original number
23 - 115 = -92
-92 ÷ 115 = -0.8
-0.8 x 100 = -80%
Example