-21.51% is the change from 846 to 664
Calculation steps:
[( 664 - 846 ) ÷ 846] x 100 = -21.51%
Formula
Percentage change = [(664 - 846) / 846] x 100
Subtract the new number by the original number
664 - 846 = -182
-182 ÷ 846 = -0.21513002364066194
-0.21513002364066194 x 100 = -21.51%