-66.8% is the change from 259 to 86
Calculation steps:
[( 86 - 259 ) ÷ 259] x 100 = -66.8%
Formula
Percentage change = [(86 - 259) / 259] x 100
Subtract the new number by the original number
86 - 259 = -173
-173 ÷ 259 = -0.667953667953668
-0.667953667953668 x 100 = -66.8%