-71.57% is the change from 999 to 284
Calculation steps:
[( 284 - 999 ) ÷ 999] x 100 = -71.57%
Formula
Percentage change = [(284 - 999) / 999] x 100
Subtract the new number by the original number
284 - 999 = -715
-715 ÷ 999 = -0.7157157157157157
-0.7157157157157157 x 100 = -71.57%