-20.56% is the change from 827 to 657
Calculation steps:
[( 657 - 827 ) ÷ 827] x 100 = -20.56%
Formula
Percentage change = [(657 - 827) / 827] x 100
Subtract the new number by the original number
657 - 827 = -170
-170 ÷ 827 = -0.20556227327690446
-0.20556227327690446 x 100 = -20.56%