-2.3% is the change from 784 to 766
Calculation steps:
[( 766 - 784 ) ÷ 784] x 100 = -2.3%
Formula
Percentage change = [(766 - 784) / 784] x 100
Subtract the new number by the original number
766 - 784 = -18
-18 ÷ 784 = -0.02295918367346939
-0.02295918367346939 x 100 = -2.3%