-65.77% is the change from 999 to 342
Calculation steps:
[( 342 - 999 ) ÷ 999] x 100 = -65.77%
Formula
Percentage change = [(342 - 999) / 999] x 100
Subtract the new number by the original number
342 - 999 = -657
-657 ÷ 999 = -0.6576576576576577
-0.6576576576576577 x 100 = -65.77%