-59.98% is the change from 997 to 399
Calculation steps:
[( 399 - 997 ) ÷ 997] x 100 = -59.98%
Formula
Percentage change = [(399 - 997) / 997] x 100
Subtract the new number by the original number
399 - 997 = -598
-598 ÷ 997 = -0.5997993981945837
-0.5997993981945837 x 100 = -59.98%