-18.75% is the change from 192 to 156
Calculation steps:
[( 156 - 192 ) ÷ 192] x 100 = -18.75%
Formula
Percentage change = [(156 - 192) / 192] x 100
Subtract the new number by the original number
156 - 192 = -36
-36 ÷ 192 = -0.1875
-0.1875 x 100 = -18.75%