-0.64% is the change from 156 to 155
Calculation steps:
[( 155 - 156 ) ÷ 156] x 100 = -0.64%
Formula
Percentage change = [(155 - 156) / 156] x 100
Subtract the new number by the original number
155 - 156 = -1
-1 ÷ 156 = -0.00641025641025641
-0.00641025641025641 x 100 = -0.64%