-0.48% is the change from 623 to 620
Calculation steps:
[( 620 - 623 ) ÷ 623] x 100 = -0.48%
Formula
Percentage change = [(620 - 623) / 623] x 100
Subtract the new number by the original number
620 - 623 = -3
-3 ÷ 623 = -0.004815409309791332
-0.004815409309791332 x 100 = -0.48%