-91.33% is the change from 830 to 72
Calculation steps:
[( 72 - 830 ) ÷ 830] x 100 = -91.33%
Formula
Percentage change = [(72 - 830) / 830] x 100
Subtract the new number by the original number
72 - 830 = -758
-758 ÷ 830 = -0.9132530120481928
-0.9132530120481928 x 100 = -91.33%