-56.52% is the change from 115 to 50
Calculation steps:
[( 50 - 115 ) ÷ 115] x 100 = -56.52%
Formula
Percentage change = [(50 - 115) / 115] x 100
Subtract the new number by the original number
50 - 115 = -65
-65 ÷ 115 = -0.5652173913043478
-0.5652173913043478 x 100 = -56.52%