-23.17% is the change from 807 to 620
Calculation steps:
[( 620 - 807 ) ÷ 807] x 100 = -23.17%
Formula
Percentage change = [(620 - 807) / 807] x 100
Subtract the new number by the original number
620 - 807 = -187
-187 ÷ 807 = -0.23172242874845106
-0.23172242874845106 x 100 = -23.17%