-16.15% is the change from 811 to 680
Calculation steps:
[( 680 - 811 ) ÷ 811] x 100 = -16.15%
Formula
Percentage change = [(680 - 811) / 811] x 100
Subtract the new number by the original number
680 - 811 = -131
-131 ÷ 811 = -0.16152897657213316
-0.16152897657213316 x 100 = -16.15%