-81.61% is the change from 310 to 57
Calculation steps:
[( 57 - 310 ) ÷ 310] x 100 = -81.61%
Formula
Percentage change = [(57 - 310) / 310] x 100
Subtract the new number by the original number
57 - 310 = -253
-253 ÷ 310 = -0.8161290322580645
-0.8161290322580645 x 100 = -81.61%