-25.03% is the change from 827 to 620
Calculation steps:
[( 620 - 827 ) ÷ 827] x 100 = -25.03%
Formula
Percentage change = [(620 - 827) / 827] x 100
Subtract the new number by the original number
620 - 827 = -207
-207 ÷ 827 = -0.2503022974607013
-0.2503022974607013 x 100 = -25.03%