-24.3% is the change from 646 to 489
Calculation steps:
[( 489 - 646 ) ÷ 646] x 100 = -24.3%
Formula
Percentage change = [(489 - 646) / 646] x 100
Subtract the new number by the original number
489 - 646 = -157
-157 ÷ 646 = -0.24303405572755418
-0.24303405572755418 x 100 = -24.3%