-20.55% is the change from 803 to 638
Calculation steps:
[( 638 - 803 ) ÷ 803] x 100 = -20.55%
Formula
Percentage change = [(638 - 803) / 803] x 100
Subtract the new number by the original number
638 - 803 = -165
-165 ÷ 803 = -0.2054794520547945
-0.2054794520547945 x 100 = -20.55%