-18.82% is the change from 797 to 647
Calculation steps:
[( 647 - 797 ) ÷ 797] x 100 = -18.82%
Formula
Percentage change = [(647 - 797) / 797] x 100
Subtract the new number by the original number
647 - 797 = -150
-150 ÷ 797 = -0.18820577164366373
-0.18820577164366373 x 100 = -18.82%