-43% is the change from 900 to 513
Calculation steps:
[( 513 - 900 ) ÷ 900] x 100 = -43%
Formula
Percentage change = [(513 - 900) / 900] x 100
Subtract the new number by the original number
513 - 900 = -387
-387 ÷ 900 = -0.43
-0.43 x 100 = -43%
Example