-47.99% is the change from 646 to 336
Calculation steps:
[( 336 - 646 ) ÷ 646] x 100 = -47.99%
Formula
Percentage change = [(336 - 646) / 646] x 100
Subtract the new number by the original number
336 - 646 = -310
-310 ÷ 646 = -0.47987616099071206
-0.47987616099071206 x 100 = -47.99%