-24.61% is the change from 646 to 487
Calculation steps:
[( 487 - 646 ) ÷ 646] x 100 = -24.61%
Formula
Percentage change = [(487 - 646) / 646] x 100
Subtract the new number by the original number
487 - 646 = -159
-159 ÷ 646 = -0.24613003095975233
-0.24613003095975233 x 100 = -24.61%