-85.48% is the change from 420 to 61
Calculation steps:
[( 61 - 420 ) ÷ 420] x 100 = -85.48%
Formula
Percentage change = [(61 - 420) / 420] x 100
Subtract the new number by the original number
61 - 420 = -359
-359 ÷ 420 = -0.8547619047619047
-0.8547619047619047 x 100 = -85.48%