-24.57% is the change from 647 to 488
Calculation steps:
[( 488 - 647 ) ÷ 647] x 100 = -24.57%
Formula
Percentage change = [(488 - 647) / 647] x 100
Subtract the new number by the original number
488 - 647 = -159
-159 ÷ 647 = -0.24574961360123648
-0.24574961360123648 x 100 = -24.57%