-0.35% is the change from 850 to 847
Calculation steps:
[( 847 - 850 ) ÷ 850] x 100 = -0.35%
Formula
Percentage change = [(847 - 850) / 850] x 100
Subtract the new number by the original number
847 - 850 = -3
-3 ÷ 850 = -0.0035294117647058825
-0.0035294117647058825 x 100 = -0.35%