-6.42% is the change from 857 to 802
Calculation steps:
[( 802 - 857 ) ÷ 857] x 100 = -6.42%
Formula
Percentage change = [(802 - 857) / 857] x 100
Subtract the new number by the original number
802 - 857 = -55
-55 ÷ 857 = -0.06417736289381563
-0.06417736289381563 x 100 = -6.42%