-85.42% is the change from 391 to 57
Calculation steps:
[( 57 - 391 ) ÷ 391] x 100 = -85.42%
Formula
Percentage change = [(57 - 391) / 391] x 100
Subtract the new number by the original number
57 - 391 = -334
-334 ÷ 391 = -0.8542199488491049
-0.8542199488491049 x 100 = -85.42%