-18.51% is the change from 643 to 524
Calculation steps:
[( 524 - 643 ) ÷ 643] x 100 = -18.51%
Formula
Percentage change = [(524 - 643) / 643] x 100
Subtract the new number by the original number
524 - 643 = -119
-119 ÷ 643 = -0.18506998444790046
-0.18506998444790046 x 100 = -18.51%