-59.6% is the change from 646 to 261
Calculation steps:
[( 261 - 646 ) ÷ 646] x 100 = -59.6%
Formula
Percentage change = [(261 - 646) / 646] x 100
Subtract the new number by the original number
261 - 646 = -385
-385 ÷ 646 = -0.5959752321981424
-0.5959752321981424 x 100 = -59.6%