-27.83% is the change from 115 to 83
Calculation steps:
[( 83 - 115 ) ÷ 115] x 100 = -27.83%
Formula
Percentage change = [(83 - 115) / 115] x 100
Subtract the new number by the original number
83 - 115 = -32
-32 ÷ 115 = -0.2782608695652174
-0.2782608695652174 x 100 = -27.83%