-1.71% is the change from 409 to 402
Calculation steps:
[( 402 - 409 ) ÷ 409] x 100 = -1.71%
Formula
Percentage change = [(402 - 409) / 409] x 100
Subtract the new number by the original number
402 - 409 = -7
-7 ÷ 409 = -0.017114914425427872
-0.017114914425427872 x 100 = -1.71%