-13.45% is the change from 766 to 663
Calculation steps:
[( 663 - 766 ) ÷ 766] x 100 = -13.45%
Formula
Percentage change = [(663 - 766) / 766] x 100
Subtract the new number by the original number
663 - 766 = -103
-103 ÷ 766 = -0.13446475195822455
-0.13446475195822455 x 100 = -13.45%