-44.4% is the change from 901 to 501
Calculation steps:
[( 501 - 901 ) ÷ 901] x 100 = -44.4%
Formula
Percentage change = [(501 - 901) / 901] x 100
Subtract the new number by the original number
501 - 901 = -400
-400 ÷ 901 = -0.4439511653718091
-0.4439511653718091 x 100 = -44.4%