-2.67% is the change from 787 to 766
Calculation steps:
[( 766 - 787 ) ÷ 787] x 100 = -2.67%
Formula
Percentage change = [(766 - 787) / 787] x 100
Subtract the new number by the original number
766 - 787 = -21
-21 ÷ 787 = -0.026683608640406607
-0.026683608640406607 x 100 = -2.67%