-64.96% is the change from 999 to 350
Calculation steps:
[( 350 - 999 ) ÷ 999] x 100 = -64.96%
Formula
Percentage change = [(350 - 999) / 999] x 100
Subtract the new number by the original number
350 - 999 = -649
-649 ÷ 999 = -0.6496496496496497
-0.6496496496496497 x 100 = -64.96%