-45.73% is the change from 960 to 521
Calculation steps:
[( 521 - 960 ) ÷ 960] x 100 = -45.73%
Formula
Percentage change = [(521 - 960) / 960] x 100
Subtract the new number by the original number
521 - 960 = -439
-439 ÷ 960 = -0.45729166666666665
-0.45729166666666665 x 100 = -45.73%