-86.85% is the change from 616 to 81
Calculation steps:
[( 81 - 616 ) ÷ 616] x 100 = -86.85%
Formula
Percentage change = [(81 - 616) / 616] x 100
Subtract the new number by the original number
81 - 616 = -535
-535 ÷ 616 = -0.8685064935064936
-0.8685064935064936 x 100 = -86.85%