-77.95% is the change from 449 to 99
Calculation steps:
[( 99 - 449 ) ÷ 449] x 100 = -77.95%
Formula
Percentage change = [(99 - 449) / 449] x 100
Subtract the new number by the original number
99 - 449 = -350
-350 ÷ 449 = -0.779510022271715
-0.779510022271715 x 100 = -77.95%