-21% is the change from 681 to 538
Calculation steps:
[( 538 - 681 ) ÷ 681] x 100 = -21%
Formula
Percentage change = [(538 - 681) / 681] x 100
Subtract the new number by the original number
538 - 681 = -143
-143 ÷ 681 = -0.20998531571218795
-0.20998531571218795 x 100 = -21%