-69.47% is the change from 999 to 305
Calculation steps:
[( 305 - 999 ) ÷ 999] x 100 = -69.47%
Formula
Percentage change = [(305 - 999) / 999] x 100
Subtract the new number by the original number
305 - 999 = -694
-694 ÷ 999 = -0.6946946946946947
-0.6946946946946947 x 100 = -69.47%