-94.58% is the change from 831 to 45
Calculation steps:
[( 45 - 831 ) ÷ 831] x 100 = -94.58%
Formula
Percentage change = [(45 - 831) / 831] x 100
Subtract the new number by the original number
45 - 831 = -786
-786 ÷ 831 = -0.9458483754512635
-0.9458483754512635 x 100 = -94.58%