-95.38% is the change from 455 to 21
Calculation steps:
[( 21 - 455 ) ÷ 455] x 100 = -95.38%
Formula
Percentage change = [(21 - 455) / 455] x 100
Subtract the new number by the original number
21 - 455 = -434
-434 ÷ 455 = -0.9538461538461539
-0.9538461538461539 x 100 = -95.38%