-9.39% is the change from 213 to 193
Calculation steps:
[( 193 - 213 ) ÷ 213] x 100 = -9.39%
Formula
Percentage change = [(193 - 213) / 213] x 100
Subtract the new number by the original number
193 - 213 = -20
-20 ÷ 213 = -0.09389671361502347
-0.09389671361502347 x 100 = -9.39%