-50.2% is the change from 247 to 123
Calculation steps:
[( 123 - 247 ) ÷ 247] x 100 = -50.2%
Formula
Percentage change = [(123 - 247) / 247] x 100
Subtract the new number by the original number
123 - 247 = -124
-124 ÷ 247 = -0.5020242914979757
-0.5020242914979757 x 100 = -50.2%