-95.02% is the change from 402 to 20
Calculation steps:
[( 20 - 402 ) ÷ 402] x 100 = -95.02%
Formula
Percentage change = [(20 - 402) / 402] x 100
Subtract the new number by the original number
20 - 402 = -382
-382 ÷ 402 = -0.9502487562189055
-0.9502487562189055 x 100 = -95.02%
Example