-37.22% is the change from 669 to 420
Calculation steps:
[( 420 - 669 ) ÷ 669] x 100 = -37.22%
Formula
Percentage change = [(420 - 669) / 669] x 100
Subtract the new number by the original number
420 - 669 = -249
-249 ÷ 669 = -0.3721973094170404
-0.3721973094170404 x 100 = -37.22%