-66.28% is the change from 86 to 29
Calculation steps:
[( 29 - 86 ) ÷ 86] x 100 = -66.28%
Formula
Percentage change = [(29 - 86) / 86] x 100
Subtract the new number by the original number
29 - 86 = -57
-57 ÷ 86 = -0.6627906976744186
-0.6627906976744186 x 100 = -66.28%