-15.54% is the change from 766 to 647
Calculation steps:
[( 647 - 766 ) ÷ 766] x 100 = -15.54%
Formula
Percentage change = [(647 - 766) / 766] x 100
Subtract the new number by the original number
647 - 766 = -119
-119 ÷ 766 = -0.15535248041775457
-0.15535248041775457 x 100 = -15.54%