-1.81% is the change from 663 to 651
Calculation steps:
[( 651 - 663 ) ÷ 663] x 100 = -1.81%
Formula
Percentage change = [(651 - 663) / 663] x 100
Subtract the new number by the original number
651 - 663 = -12
-12 ÷ 663 = -0.01809954751131222
-0.01809954751131222 x 100 = -1.81%