-24.37% is the change from 517 to 391
Calculation steps:
[( 391 - 517 ) ÷ 517] x 100 = -24.37%
Formula
Percentage change = [(391 - 517) / 517] x 100
Subtract the new number by the original number
391 - 517 = -126
-126 ÷ 517 = -0.2437137330754352
-0.2437137330754352 x 100 = -24.37%