-22.38% is the change from 648 to 503
Calculation steps:
[( 503 - 648 ) ÷ 648] x 100 = -22.38%
Formula
Percentage change = [(503 - 648) / 648] x 100
Subtract the new number by the original number
503 - 648 = -145
-145 ÷ 648 = -0.22376543209876543
-0.22376543209876543 x 100 = -22.38%