-18.35% is the change from 643 to 525
Calculation steps:
[( 525 - 643 ) ÷ 643] x 100 = -18.35%
Formula
Percentage change = [(525 - 643) / 643] x 100
Subtract the new number by the original number
525 - 643 = -118
-118 ÷ 643 = -0.18351477449455678
-0.18351477449455678 x 100 = -18.35%