-57.47% is the change from 917 to 390
Calculation steps:
[( 390 - 917 ) ÷ 917] x 100 = -57.47%
Formula
Percentage change = [(390 - 917) / 917] x 100
Subtract the new number by the original number
390 - 917 = -527
-527 ÷ 917 = -0.5747001090512541
-0.5747001090512541 x 100 = -57.47%