-3.54% is the change from 847 to 817
Calculation steps:
[( 817 - 847 ) ÷ 847] x 100 = -3.54%
Formula
Percentage change = [(817 - 847) / 847] x 100
Subtract the new number by the original number
817 - 847 = -30
-30 ÷ 847 = -0.03541912632821724
-0.03541912632821724 x 100 = -3.54%