-15.17% is the change from 811 to 688
Calculation steps:
[( 688 - 811 ) ÷ 811] x 100 = -15.17%
Formula
Percentage change = [(688 - 811) / 811] x 100
Subtract the new number by the original number
688 - 811 = -123
-123 ÷ 811 = -0.15166461159062886
-0.15166461159062886 x 100 = -15.17%