-95.39% is the change from 456 to 21
Calculation steps:
[( 21 - 456 ) ÷ 456] x 100 = -95.39%
Formula
Percentage change = [(21 - 456) / 456] x 100
Subtract the new number by the original number
21 - 456 = -435
-435 ÷ 456 = -0.9539473684210527
-0.9539473684210527 x 100 = -95.39%