-60% is the change from 425 to 170
Calculation steps:
[( 170 - 425 ) ÷ 425] x 100 = -60%
Formula
Percentage change = [(170 - 425) / 425] x 100
Subtract the new number by the original number
170 - 425 = -255
-255 ÷ 425 = -0.6
-0.6 x 100 = -60%
Example