-9.86% is the change from 213 to 192
Calculation steps:
[( 192 - 213 ) ÷ 213] x 100 = -9.86%
Formula
Percentage change = [(192 - 213) / 213] x 100
Subtract the new number by the original number
192 - 213 = -21
-21 ÷ 213 = -0.09859154929577464
-0.09859154929577464 x 100 = -9.86%