-77.85% is the change from 447 to 99
Calculation steps:
[( 99 - 447 ) ÷ 447] x 100 = -77.85%
Formula
Percentage change = [(99 - 447) / 447] x 100
Subtract the new number by the original number
99 - 447 = -348
-348 ÷ 447 = -0.7785234899328859
-0.7785234899328859 x 100 = -77.85%