-24.77% is the change from 646 to 486
Calculation steps:
[( 486 - 646 ) ÷ 646] x 100 = -24.77%
Formula
Percentage change = [(486 - 646) / 646] x 100
Subtract the new number by the original number
486 - 646 = -160
-160 ÷ 646 = -0.2476780185758514
-0.2476780185758514 x 100 = -24.77%