-4.15% is the change from 650 to 623
Calculation steps:
[( 623 - 650 ) ÷ 650] x 100 = -4.15%
Formula
Percentage change = [(623 - 650) / 650] x 100
Subtract the new number by the original number
623 - 650 = -27
-27 ÷ 650 = -0.04153846153846154
-0.04153846153846154 x 100 = -4.15%