-79.47% is the change from 643 to 132
Calculation steps:
[( 132 - 643 ) ÷ 643] x 100 = -79.47%
Formula
Percentage change = [(132 - 643) / 643] x 100
Subtract the new number by the original number
132 - 643 = -511
-511 ÷ 643 = -0.7947122861586314
-0.7947122861586314 x 100 = -79.47%