-29.19% is the change from 901 to 638
Calculation steps:
[( 638 - 901 ) ÷ 901] x 100 = -29.19%
Formula
Percentage change = [(638 - 901) / 901] x 100
Subtract the new number by the original number
638 - 901 = -263
-263 ÷ 901 = -0.29189789123196447
-0.29189789123196447 x 100 = -29.19%