-18.2% is the change from 643 to 526
Calculation steps:
[( 526 - 643 ) ÷ 643] x 100 = -18.2%
Formula
Percentage change = [(526 - 643) / 643] x 100
Subtract the new number by the original number
526 - 643 = -117
-117 ÷ 643 = -0.18195956454121306
-0.18195956454121306 x 100 = -18.2%