-59.62% is the change from 988 to 399
Calculation steps:
[( 399 - 988 ) ÷ 988] x 100 = -59.62%
Formula
Percentage change = [(399 - 988) / 988] x 100
Subtract the new number by the original number
399 - 988 = -589
-589 ÷ 988 = -0.5961538461538461
-0.5961538461538461 x 100 = -59.62%