-9.59% is the change from 918 to 830
Calculation steps:
[( 830 - 918 ) ÷ 918] x 100 = -9.59%
Formula
Percentage change = [(830 - 918) / 918] x 100
Subtract the new number by the original number
830 - 918 = -88
-88 ÷ 918 = -0.09586056644880174
-0.09586056644880174 x 100 = -9.59%