-59.76% is the change from 999 to 402
Calculation steps:
[( 402 - 999 ) ÷ 999] x 100 = -59.76%
Formula
Percentage change = [(402 - 999) / 999] x 100
Subtract the new number by the original number
402 - 999 = -597
-597 ÷ 999 = -0.5975975975975976
-0.5975975975975976 x 100 = -59.76%