-50.21% is the change from 243 to 121
Calculation steps:
[( 121 - 243 ) ÷ 243] x 100 = -50.21%
Formula
Percentage change = [(121 - 243) / 243] x 100
Subtract the new number by the original number
121 - 243 = -122
-122 ÷ 243 = -0.5020576131687243
-0.5020576131687243 x 100 = -50.21%