-21.32% is the change from 197 to 155
Calculation steps:
[( 155 - 197 ) ÷ 197] x 100 = -21.32%
Formula
Percentage change = [(155 - 197) / 197] x 100
Subtract the new number by the original number
155 - 197 = -42
-42 ÷ 197 = -0.2131979695431472
-0.2131979695431472 x 100 = -21.32%