-16.28% is the change from 915 to 766
Calculation steps:
[( 766 - 915 ) ÷ 915] x 100 = -16.28%
Formula
Percentage change = [(766 - 915) / 915] x 100
Subtract the new number by the original number
766 - 915 = -149
-149 ÷ 915 = -0.1628415300546448
-0.1628415300546448 x 100 = -16.28%