-42.43% is the change from 905 to 521
Calculation steps:
[( 521 - 905 ) ÷ 905] x 100 = -42.43%
Formula
Percentage change = [(521 - 905) / 905] x 100
Subtract the new number by the original number
521 - 905 = -384
-384 ÷ 905 = -0.4243093922651934
-0.4243093922651934 x 100 = -42.43%