-95.95% is the change from 420 to 17
Calculation steps:
[( 17 - 420 ) ÷ 420] x 100 = -95.95%
Formula
Percentage change = [(17 - 420) / 420] x 100
Subtract the new number by the original number
17 - 420 = -403
-403 ÷ 420 = -0.9595238095238096
-0.9595238095238096 x 100 = -95.95%