-81.31% is the change from 305 to 57
Calculation steps:
[( 57 - 305 ) ÷ 305] x 100 = -81.31%
Formula
Percentage change = [(57 - 305) / 305] x 100
Subtract the new number by the original number
57 - 305 = -248
-248 ÷ 305 = -0.8131147540983606
-0.8131147540983606 x 100 = -81.31%