-28.38% is the change from 902 to 646
Calculation steps:
[( 646 - 902 ) ÷ 902] x 100 = -28.38%
Formula
Percentage change = [(646 - 902) / 902] x 100
Subtract the new number by the original number
646 - 902 = -256
-256 ÷ 902 = -0.2838137472283814
-0.2838137472283814 x 100 = -28.38%