-91.3% is the change from 816 to 71
Calculation steps:
[( 71 - 816 ) ÷ 816] x 100 = -91.3%
Formula
Percentage change = [(71 - 816) / 816] x 100
Subtract the new number by the original number
71 - 816 = -745
-745 ÷ 816 = -0.9129901960784313
-0.9129901960784313 x 100 = -91.3%