-30.81% is the change from 607 to 420
Calculation steps:
[( 420 - 607 ) ÷ 607] x 100 = -30.81%
Formula
Percentage change = [(420 - 607) / 607] x 100
Subtract the new number by the original number
420 - 607 = -187
-187 ÷ 607 = -0.30807248764415157
-0.30807248764415157 x 100 = -30.81%