-42.18% is the change from 901 to 521
Calculation steps:
[( 521 - 901 ) ÷ 901] x 100 = -42.18%
Formula
Percentage change = [(521 - 901) / 901] x 100
Subtract the new number by the original number
521 - 901 = -380
-380 ÷ 901 = -0.42175360710321863
-0.42175360710321863 x 100 = -42.18%