-1.23% is the change from 163 to 161
Calculation steps:
[( 161 - 163 ) ÷ 163] x 100 = -1.23%
Formula
Percentage change = [(161 - 163) / 163] x 100
Subtract the new number by the original number
161 - 163 = -2
-2 ÷ 163 = -0.012269938650306749
-0.012269938650306749 x 100 = -1.23%