-42.56% is the change from 900 to 517
Calculation steps:
[( 517 - 900 ) ÷ 900] x 100 = -42.56%
Formula
Percentage change = [(517 - 900) / 900] x 100
Subtract the new number by the original number
517 - 900 = -383
-383 ÷ 900 = -0.4255555555555556
-0.4255555555555556 x 100 = -42.56%