-21.46% is the change from 685 to 538
Calculation steps:
[( 538 - 685 ) ÷ 685] x 100 = -21.46%
Formula
Percentage change = [(538 - 685) / 685] x 100
Subtract the new number by the original number
538 - 685 = -147
-147 ÷ 685 = -0.2145985401459854
-0.2145985401459854 x 100 = -21.46%