-20.99% is the change from 243 to 192
Calculation steps:
[( 192 - 243 ) ÷ 243] x 100 = -20.99%
Formula
Percentage change = [(192 - 243) / 243] x 100
Subtract the new number by the original number
192 - 243 = -51
-51 ÷ 243 = -0.20987654320987653
-0.20987654320987653 x 100 = -20.99%