-94.49% is the change from 816 to 45
Calculation steps:
[( 45 - 816 ) ÷ 816] x 100 = -94.49%
Formula
Percentage change = [(45 - 816) / 816] x 100
Subtract the new number by the original number
45 - 816 = -771
-771 ÷ 816 = -0.9448529411764706
-0.9448529411764706 x 100 = -94.49%