-78.93% is the change from 394 to 83
Calculation steps:
[( 83 - 394 ) ÷ 394] x 100 = -78.93%
Formula
Percentage change = [(83 - 394) / 394] x 100
Subtract the new number by the original number
83 - 394 = -311
-311 ÷ 394 = -0.7893401015228426
-0.7893401015228426 x 100 = -78.93%