-13.91% is the change from 647 to 557
Calculation steps:
[( 557 - 647 ) ÷ 647] x 100 = -13.91%
Formula
Percentage change = [(557 - 647) / 647] x 100
Subtract the new number by the original number
557 - 647 = -90
-90 ÷ 647 = -0.1391035548686244
-0.1391035548686244 x 100 = -13.91%