-19.58% is the change from 802 to 645
Calculation steps:
[( 645 - 802 ) ÷ 802] x 100 = -19.58%
Formula
Percentage change = [(645 - 802) / 802] x 100
Subtract the new number by the original number
645 - 802 = -157
-157 ÷ 802 = -0.19576059850374064
-0.19576059850374064 x 100 = -19.58%