-22.55% is the change from 643 to 498
Calculation steps:
[( 498 - 643 ) ÷ 643] x 100 = -22.55%
Formula
Percentage change = [(498 - 643) / 643] x 100
Subtract the new number by the original number
498 - 643 = -145
-145 ÷ 643 = -0.2255054432348367
-0.2255054432348367 x 100 = -22.55%