-95.6% is the change from 455 to 20
Calculation steps:
[( 20 - 455 ) ÷ 455] x 100 = -95.6%
Formula
Percentage change = [(20 - 455) / 455] x 100
Subtract the new number by the original number
20 - 455 = -435
-435 ÷ 455 = -0.9560439560439561
-0.9560439560439561 x 100 = -95.6%