-79.32% is the change from 643 to 133
Calculation steps:
[( 133 - 643 ) ÷ 643] x 100 = -79.32%
Formula
Percentage change = [(133 - 643) / 643] x 100
Subtract the new number by the original number
133 - 643 = -510
-510 ÷ 643 = -0.7931570762052877
-0.7931570762052877 x 100 = -79.32%