-49.75% is the change from 402 to 202
Calculation steps:
[( 202 - 402 ) ÷ 402] x 100 = -49.75%
Formula
Percentage change = [(202 - 402) / 402] x 100
Subtract the new number by the original number
202 - 402 = -200
-200 ÷ 402 = -0.4975124378109453
-0.4975124378109453 x 100 = -49.75%