-92.32% is the change from 859 to 66
Calculation steps:
[( 66 - 859 ) ÷ 859] x 100 = -92.32%
Formula
Percentage change = [(66 - 859) / 859] x 100
Subtract the new number by the original number
66 - 859 = -793
-793 ÷ 859 = -0.9231664726426076
-0.9231664726426076 x 100 = -92.32%