-67.34% is the change from 643 to 210
Calculation steps:
[( 210 - 643 ) ÷ 643] x 100 = -67.34%
Formula
Percentage change = [(210 - 643) / 643] x 100
Subtract the new number by the original number
210 - 643 = -433
-433 ÷ 643 = -0.6734059097978227
-0.6734059097978227 x 100 = -67.34%