-86.52% is the change from 601 to 81
Calculation steps:
[( 81 - 601 ) ÷ 601] x 100 = -86.52%
Formula
Percentage change = [(81 - 601) / 601] x 100
Subtract the new number by the original number
81 - 601 = -520
-520 ÷ 601 = -0.8652246256239601
-0.8652246256239601 x 100 = -86.52%