-57.87% is the change from 947 to 399
Calculation steps:
[( 399 - 947 ) ÷ 947] x 100 = -57.87%
Formula
Percentage change = [(399 - 947) / 947] x 100
Subtract the new number by the original number
399 - 947 = -548
-548 ÷ 947 = -0.5786694825765576
-0.5786694825765576 x 100 = -57.87%