-64.91% is the change from 57 to 20
Calculation steps:
[( 20 - 57 ) ÷ 57] x 100 = -64.91%
Formula
Percentage change = [(20 - 57) / 57] x 100
Subtract the new number by the original number
20 - 57 = -37
-37 ÷ 57 = -0.6491228070175439
-0.6491228070175439 x 100 = -64.91%