-21.87% is the change from 686 to 536
Calculation steps:
[( 536 - 686 ) ÷ 686] x 100 = -21.87%
Formula
Percentage change = [(536 - 686) / 686] x 100
Subtract the new number by the original number
536 - 686 = -150
-150 ÷ 686 = -0.21865889212827988
-0.21865889212827988 x 100 = -21.87%