-59.16% is the change from 977 to 399
Calculation steps:
[( 399 - 977 ) ÷ 977] x 100 = -59.16%
Formula
Percentage change = [(399 - 977) / 977] x 100
Subtract the new number by the original number
399 - 977 = -578
-578 ÷ 977 = -0.5916069600818833
-0.5916069600818833 x 100 = -59.16%