-1.25% is the change from 160 to 158
Calculation steps:
[( 158 - 160 ) ÷ 160] x 100 = -1.25%
Formula
Percentage change = [(158 - 160) / 160] x 100
Subtract the new number by the original number
158 - 160 = -2
-2 ÷ 160 = -0.0125
-0.0125 x 100 = -1.25%