-1.77% is the change from 623 to 612
Calculation steps:
[( 612 - 623 ) ÷ 623] x 100 = -1.77%
Formula
Percentage change = [(612 - 623) / 623] x 100
Subtract the new number by the original number
612 - 623 = -11
-11 ÷ 623 = -0.01765650080256822
-0.01765650080256822 x 100 = -1.77%