-17.14% is the change from 817 to 677
Calculation steps:
[( 677 - 817 ) ÷ 817] x 100 = -17.14%
Formula
Percentage change = [(677 - 817) / 817] x 100
Subtract the new number by the original number
677 - 817 = -140
-140 ÷ 817 = -0.17135862913096694
-0.17135862913096694 x 100 = -17.14%