-21.72% is the change from 999 to 782
Calculation steps:
[( 782 - 999 ) ÷ 999] x 100 = -21.72%
Formula
Percentage change = [(782 - 999) / 999] x 100
Subtract the new number by the original number
782 - 999 = -217
-217 ÷ 999 = -0.2172172172172172
-0.2172172172172172 x 100 = -21.72%