-26.77% is the change from 620 to 454
Calculation steps:
[( 454 - 620 ) ÷ 620] x 100 = -26.77%
Formula
Percentage change = [(454 - 620) / 620] x 100
Subtract the new number by the original number
454 - 620 = -166
-166 ÷ 620 = -0.267741935483871
-0.267741935483871 x 100 = -26.77%