-41% is the change from 900 to 531
Calculation steps:
[( 531 - 900 ) ÷ 900] x 100 = -41%
Formula
Percentage change = [(531 - 900) / 900] x 100
Subtract the new number by the original number
531 - 900 = -369
-369 ÷ 900 = -0.41
-0.41 x 100 = -41%
Example