-25.6% is the change from 840 to 625
Calculation steps:
[( 625 - 840 ) ÷ 840] x 100 = -25.6%
Formula
Percentage change = [(625 - 840) / 840] x 100
Subtract the new number by the original number
625 - 840 = -215
-215 ÷ 840 = -0.25595238095238093
-0.25595238095238093 x 100 = -25.6%