-13.51% is the change from 644 to 557
Calculation steps:
[( 557 - 644 ) ÷ 644] x 100 = -13.51%
Formula
Percentage change = [(557 - 644) / 644] x 100
Subtract the new number by the original number
557 - 644 = -87
-87 ÷ 644 = -0.13509316770186336
-0.13509316770186336 x 100 = -13.51%