-7.05% is the change from 638 to 593
Calculation steps:
[( 593 - 638 ) ÷ 638] x 100 = -7.05%
Formula
Percentage change = [(593 - 638) / 638] x 100
Subtract the new number by the original number
593 - 638 = -45
-45 ÷ 638 = -0.07053291536050156
-0.07053291536050156 x 100 = -7.05%