-21.42% is the change from 789 to 620
Calculation steps:
[( 620 - 789 ) ÷ 789] x 100 = -21.42%
Formula
Percentage change = [(620 - 789) / 789] x 100
Subtract the new number by the original number
620 - 789 = -169
-169 ÷ 789 = -0.21419518377693283
-0.21419518377693283 x 100 = -21.42%