-29.18% is the change from 449 to 318
Calculation steps:
[( 318 - 449 ) ÷ 449] x 100 = -29.18%
Formula
Percentage change = [(318 - 449) / 449] x 100
Subtract the new number by the original number
318 - 449 = -131
-131 ÷ 449 = -0.29175946547884185
-0.29175946547884185 x 100 = -29.18%