-16.62% is the change from 776 to 647
Calculation steps:
[( 647 - 776 ) ÷ 776] x 100 = -16.62%
Formula
Percentage change = [(647 - 776) / 776] x 100
Subtract the new number by the original number
647 - 776 = -129
-129 ÷ 776 = -0.16623711340206185
-0.16623711340206185 x 100 = -16.62%