-26.71% is the change from 820 to 601
Calculation steps:
[( 601 - 820 ) ÷ 820] x 100 = -26.71%
Formula
Percentage change = [(601 - 820) / 820] x 100
Subtract the new number by the original number
601 - 820 = -219
-219 ÷ 820 = -0.26707317073170733
-0.26707317073170733 x 100 = -26.71%