-78.92% is the change from 166 to 35
Calculation steps:
[( 35 - 166 ) ÷ 166] x 100 = -78.92%
Formula
Percentage change = [(35 - 166) / 166] x 100
Subtract the new number by the original number
35 - 166 = -131
-131 ÷ 166 = -0.7891566265060241
-0.7891566265060241 x 100 = -78.92%