-50.43% is the change from 115 to 57
Calculation steps:
[( 57 - 115 ) ÷ 115] x 100 = -50.43%
Formula
Percentage change = [(57 - 115) / 115] x 100
Subtract the new number by the original number
57 - 115 = -58
-58 ÷ 115 = -0.5043478260869565
-0.5043478260869565 x 100 = -50.43%