-27.26% is the change from 620 to 451
Calculation steps:
[( 451 - 620 ) ÷ 620] x 100 = -27.26%
Formula
Percentage change = [(451 - 620) / 620] x 100
Subtract the new number by the original number
451 - 620 = -169
-169 ÷ 620 = -0.2725806451612903
-0.2725806451612903 x 100 = -27.26%