-18.05% is the change from 831 to 681
Calculation steps:
[( 681 - 831 ) ÷ 831] x 100 = -18.05%
Formula
Percentage change = [(681 - 831) / 831] x 100
Subtract the new number by the original number
681 - 831 = -150
-150 ÷ 831 = -0.18050541516245489
-0.18050541516245489 x 100 = -18.05%