-79.44% is the change from 394 to 81
Calculation steps:
[( 81 - 394 ) ÷ 394] x 100 = -79.44%
Formula
Percentage change = [(81 - 394) / 394] x 100
Subtract the new number by the original number
81 - 394 = -313
-313 ÷ 394 = -0.7944162436548223
-0.7944162436548223 x 100 = -79.44%