-72.92% is the change from 816 to 221
Calculation steps:
[( 221 - 816 ) ÷ 816] x 100 = -72.92%
Formula
Percentage change = [(221 - 816) / 816] x 100
Subtract the new number by the original number
221 - 816 = -595
-595 ÷ 816 = -0.7291666666666666
-0.7291666666666666 x 100 = -72.92%