-66.14% is the change from 251 to 85
Calculation steps:
[( 85 - 251 ) ÷ 251] x 100 = -66.14%
Formula
Percentage change = [(85 - 251) / 251] x 100
Subtract the new number by the original number
85 - 251 = -166
-166 ÷ 251 = -0.6613545816733067
-0.6613545816733067 x 100 = -66.14%