-8.57% is the change from 210 to 192
Calculation steps:
[( 192 - 210 ) ÷ 210] x 100 = -8.57%
Formula
Percentage change = [(192 - 210) / 210] x 100
Subtract the new number by the original number
192 - 210 = -18
-18 ÷ 210 = -0.08571428571428572
-0.08571428571428572 x 100 = -8.57%