-6.87% is the change from 902 to 840
Calculation steps:
[( 840 - 902 ) ÷ 902] x 100 = -6.87%
Formula
Percentage change = [(840 - 902) / 902] x 100
Subtract the new number by the original number
840 - 902 = -62
-62 ÷ 902 = -0.06873614190687362
-0.06873614190687362 x 100 = -6.87%