-79.73% is the change from 449 to 91
Calculation steps:
[( 91 - 449 ) ÷ 449] x 100 = -79.73%
Formula
Percentage change = [(91 - 449) / 449] x 100
Subtract the new number by the original number
91 - 449 = -358
-358 ÷ 449 = -0.7973273942093542
-0.7973273942093542 x 100 = -79.73%