-50.19% is the change from 807 to 402
Calculation steps:
[( 402 - 807 ) ÷ 807] x 100 = -50.19%
Formula
Percentage change = [(402 - 807) / 807] x 100
Subtract the new number by the original number
402 - 807 = -405
-405 ÷ 807 = -0.5018587360594795
-0.5018587360594795 x 100 = -50.19%