-21.14% is the change from 402 to 317
Calculation steps:
[( 317 - 402 ) ÷ 402] x 100 = -21.14%
Formula
Percentage change = [(317 - 402) / 402] x 100
Subtract the new number by the original number
317 - 402 = -85
-85 ÷ 402 = -0.21144278606965175
-0.21144278606965175 x 100 = -21.14%