-22.79% is the change from 645 to 498
Calculation steps:
[( 498 - 645 ) ÷ 645] x 100 = -22.79%
Formula
Percentage change = [(498 - 645) / 645] x 100
Subtract the new number by the original number
498 - 645 = -147
-147 ÷ 645 = -0.22790697674418606
-0.22790697674418606 x 100 = -22.79%