-66.94% is the change from 847 to 280
Calculation steps:
[( 280 - 847 ) ÷ 847] x 100 = -66.94%
Formula
Percentage change = [(280 - 847) / 847] x 100
Subtract the new number by the original number
280 - 847 = -567
-567 ÷ 847 = -0.6694214876033058
-0.6694214876033058 x 100 = -66.94%