-9.04% is the change from 830 to 755
Calculation steps:
[( 755 - 830 ) ÷ 830] x 100 = -9.04%
Formula
Percentage change = [(755 - 830) / 830] x 100
Subtract the new number by the original number
755 - 830 = -75
-75 ÷ 830 = -0.09036144578313253
-0.09036144578313253 x 100 = -9.04%