-29.36% is the change from 688 to 486
Calculation steps:
[( 486 - 688 ) ÷ 688] x 100 = -29.36%
Formula
Percentage change = [(486 - 688) / 688] x 100
Subtract the new number by the original number
486 - 688 = -202
-202 ÷ 688 = -0.2936046511627907
-0.2936046511627907 x 100 = -29.36%