-95.57% is the change from 451 to 20
Calculation steps:
[( 20 - 451 ) ÷ 451] x 100 = -95.57%
Formula
Percentage change = [(20 - 451) / 451] x 100
Subtract the new number by the original number
20 - 451 = -431
-431 ÷ 451 = -0.9556541019955654
-0.9556541019955654 x 100 = -95.57%