-85.71% is the change from 420 to 60
Calculation steps:
[( 60 - 420 ) ÷ 420] x 100 = -85.71%
Formula
Percentage change = [(60 - 420) / 420] x 100
Subtract the new number by the original number
60 - 420 = -360
-360 ÷ 420 = -0.8571428571428571
-0.8571428571428571 x 100 = -85.71%