-87.61% is the change from 654 to 81
Calculation steps:
[( 81 - 654 ) ÷ 654] x 100 = -87.61%
Formula
Percentage change = [(81 - 654) / 654] x 100
Subtract the new number by the original number
81 - 654 = -573
-573 ÷ 654 = -0.8761467889908257
-0.8761467889908257 x 100 = -87.61%