-40.35% is the change from 57 to 34
Calculation steps:
[( 34 - 57 ) ÷ 57] x 100 = -40.35%
Formula
Percentage change = [(34 - 57) / 57] x 100
Subtract the new number by the original number
34 - 57 = -23
-23 ÷ 57 = -0.40350877192982454
-0.40350877192982454 x 100 = -40.35%