-94.78% is the change from 402 to 21
Calculation steps:
[( 21 - 402 ) ÷ 402] x 100 = -94.78%
Formula
Percentage change = [(21 - 402) / 402] x 100
Subtract the new number by the original number
21 - 402 = -381
-381 ÷ 402 = -0.9477611940298507
-0.9477611940298507 x 100 = -94.78%