-42.49% is the change from 906 to 521
Calculation steps:
[( 521 - 906 ) ÷ 906] x 100 = -42.49%
Formula
Percentage change = [(521 - 906) / 906] x 100
Subtract the new number by the original number
521 - 906 = -385
-385 ÷ 906 = -0.4249448123620309
-0.4249448123620309 x 100 = -42.49%