-97.01% is the change from 402 to 12
Calculation steps:
[( 12 - 402 ) ÷ 402] x 100 = -97.01%
Formula
Percentage change = [(12 - 402) / 402] x 100
Subtract the new number by the original number
12 - 402 = -390
-390 ÷ 402 = -0.9701492537313433
-0.9701492537313433 x 100 = -97.01%