-93.4% is the change from 197 to 13
Calculation steps:
[( 13 - 197 ) ÷ 197] x 100 = -93.4%
Formula
Percentage change = [(13 - 197) / 197] x 100
Subtract the new number by the original number
13 - 197 = -184
-184 ÷ 197 = -0.934010152284264
-0.934010152284264 x 100 = -93.4%