-49.9% is the change from 485 to 243
Calculation steps:
[( 243 - 485 ) ÷ 485] x 100 = -49.9%
Formula
Percentage change = [(243 - 485) / 485] x 100
Subtract the new number by the original number
243 - 485 = -242
-242 ÷ 485 = -0.49896907216494846
-0.49896907216494846 x 100 = -49.9%