-46.43% is the change from 420 to 225
Calculation steps:
[( 225 - 420 ) ÷ 420] x 100 = -46.43%
Formula
Percentage change = [(225 - 420) / 420] x 100
Subtract the new number by the original number
225 - 420 = -195
-195 ÷ 420 = -0.4642857142857143
-0.4642857142857143 x 100 = -46.43%