-66.1% is the change from 643 to 218
Calculation steps:
[( 218 - 643 ) ÷ 643] x 100 = -66.1%
Formula
Percentage change = [(218 - 643) / 643] x 100
Subtract the new number by the original number
218 - 643 = -425
-425 ÷ 643 = -0.6609642301710731
-0.6609642301710731 x 100 = -66.1%