-7.74% is the change from 155 to 143
Calculation steps:
[( 143 - 155 ) ÷ 155] x 100 = -7.74%
Formula
Percentage change = [(143 - 155) / 155] x 100
Subtract the new number by the original number
143 - 155 = -12
-12 ÷ 155 = -0.07741935483870968
-0.07741935483870968 x 100 = -7.74%