-25.21% is the change from 853 to 638
Calculation steps:
[( 638 - 853 ) ÷ 853] x 100 = -25.21%
Formula
Percentage change = [(638 - 853) / 853] x 100
Subtract the new number by the original number
638 - 853 = -215
-215 ÷ 853 = -0.25205158264947247
-0.25205158264947247 x 100 = -25.21%