-36% is the change from 250 to 160
Calculation steps:
[( 160 - 250 ) ÷ 250] x 100 = -36%
Formula
Percentage change = [(160 - 250) / 250] x 100
Subtract the new number by the original number
160 - 250 = -90
-90 ÷ 250 = -0.36
-0.36 x 100 = -36%
Example