-50.25% is the change from 802 to 399
Calculation steps:
[( 399 - 802 ) ÷ 802] x 100 = -50.25%
Formula
Percentage change = [(399 - 802) / 802] x 100
Subtract the new number by the original number
399 - 802 = -403
-403 ÷ 802 = -0.5024937655860349
-0.5024937655860349 x 100 = -50.25%