-30.6% is the change from 402 to 279
Calculation steps:
[( 279 - 402 ) ÷ 402] x 100 = -30.6%
Formula
Percentage change = [(279 - 402) / 402] x 100
Subtract the new number by the original number
279 - 402 = -123
-123 ÷ 402 = -0.30597014925373134
-0.30597014925373134 x 100 = -30.6%